- i- 
 
 
 GIFT 
 MA.fi 10 1916 
 
 Volume Eight 
 
 Number One 
 
 SCHOOL OF MINES 
 AND METALLURGY 
 
 UNIVERSITY OF (MISSOURI 
 
 
 BULLETIN 
 
 JANUARY 1916 
 
 BIBLIOGRAPHY 
 
 CONCENTRATING ORES 
 BY FLOTATION 
 
 Entered as second-class matter January 7, 1909, at the postoffice at Rolla, 
 Missouri, under the act of July 18, 1894. Issued Quarterly. 
 
SCHOOL OF MINES 
 AND METALLURGY 
 
 UNIVERSITY OF MISSOURI 
 
 
 LIST OF REFERENCES ON 
 
 CONCENTRATING ORES 
 
 BY FLOTATION 
 
 Compiled by Jesse Cunningham^ Librarian 
 
 THE MISSOURI SCHOOL OF MINES AND METALLURGY, THE MISSOURI 
 
 BUREAU OF GEOLOGY AND MINES AND THE UNITED STATES 
 
 BUREAU OF MINES are making cooperative investigations on the Milling and 
 Concentration of Missouri Ores. 
 
 ROLLA, MISSOURI 
 J9J6 
 
 
rn 
 H 
 
LIBRARY STAFF 
 
 Jesse Cunningham Librarian 
 
 Mrs. C. W. Bower Assistant 
 
 Richard Cooper . . .Student Assistant 
 
 Harry J. Schicrmeyer . .Student Assistant 
 
 342074 
 
8 
 
TABLE OF CONTENTS 
 
 Page 
 
 Prefatory note 7 
 
 Abbreviations used 9-10 
 
 Bibliography 11 
 
 General works 11 
 
 Articles in periodicals 1 1-43 
 
 Colloids and surface tension 44-51 
 
 Litigation 51-54 
 
 Patents 55-90 
 
 Name index to patents 91-93 
 
 Author-Subject index .. .... 94-104 
 
 Publications of the Missouri School of Mines.... ...105-106 
 
MISSOURI SCHOOIy OF MINKS. 
 
 PREFATORY NOTE. 
 
 This list has been prepared primarily for the use of the Min- 
 ing Experiment Station and students of the School of Mines and 
 Metallurgy engaged in experimentation at the flotation labora- 
 tory of this institution, and is based on the collection of material 
 now in the library of the school. It is hoped, however, that the 
 list will serve as a guide, at least in America, to the study of the 
 subject. Emphasis has been placed on no particular feature of 
 the process, the intent being to include all important material 
 coming under the observation of the compiler. Articles con- 
 taining mere mention of the 'name of a process or the name of 
 a company using a process are not included. 
 
 The great interest in the subject of colloids and surface 
 tension in its connection with the theory of oil flotation pro- 
 cesses warrants the inclusion of a section devoted to references 
 on this phase. No claim for completeness is made, as the plan 
 adapted was to choose from the mass of material on colloids 
 and surface tension the better known standard books and 
 articles, and to include enough of these to serve as a basis for 
 further study and experimentation. 
 
 Acknowledgment is due Theodore Jesse Hoover for a lib- 
 eral use of his bibliography in the second edition of "Concen- 
 trating Ores by Flotation" ; to the libraries of St. Louis, 
 especially the St. Louis Public and the Academy of Science, for 
 courtesies extended, and to Carl Stifel for the use of his collec- 
 tion of United States patents. The list has profited from many 
 valuable suggestions made by Professor V. H. Gottschalk of 
 the Department of Chemistry. Professor Gottschalk is deeply 
 interested in the theory of flotation, especially as it is connected 
 with colloidal chemistry and surface tension. His expert 
 knowledge was placed at our disposal without reservation. 
 
 The table of contents shows the arrangement of the refer- 
 ences. A name index to patents follows that section. An 
 author-subject index appears also at the end, pointing out the 
 literature on special and more minute phases of the subject. 
 The numbers in these indexes refer to items and not to pages. 
 
 "V 
 
 JESSE CUNNINGHAM. 
 
MISSOURI SCHOOL OF MINES. 9 
 
 ABBREVIATIONS USED. 
 
 Aust. Min. Stand. Australian Mining Standard. 
 
 Austral. Min. & Eng. Rev. Australian Mining and Engineering Review. 
 
 B. C. Min. Exch. British Columbia Mining Exchange. 
 
 Bull. Am. Inst. Min. Engrs. Bulletin of the American Institute of Mining 
 Engineers. 
 
 Bull. Instn. Min. & Metl. Bulletin of the Institution of Minftig and 
 Metallurgy. 
 
 Can. Min. Jour. Canadian Mining Journal. 
 
 Can. Min. Rev. Canadian Mining Review. 
 
 Chem. Metl. & Min. Soc. of S. Africa. Journal of the Chemical, Metal- 
 lurgical and Mining Society of South Africa. 
 
 Chem. News. Chemical News. 
 
 Electrochem. & Metl. Indust. Electrochemical and Metallurgical Industry. 
 
 Eng. & Min. Jour. Engineering and Mining Journal. 
 
 Eng. Mag. Engineering Magazine. 
 
 Jour. Amer. Chem. Soc. Journal of the American Chemical Society. 
 
 Jour. Fr. Inst. Journal of the Franklin Institute. 
 
 Jour. Phys. Chem. Journal of Physical Chemistry. 
 
 Jour. Soc. Chem. Indust. Journal of the Society of Chemical Industry. 
 
 Journ. Can. Min. Inst. Journal of the Canadian Mining Institute. 
 
 Metl. Chm. Engng. Metallurgical and Chemical Engineering. 
 
 Mex. Min. Jour. Mexican Mining Journal 
 
 Min. & Eng. R"ev. Mining and Engineering Review. 
 
 Min. & Engng. Wl'd. Mining and Engineering World. 
 
 Min. & Metl. Soc. Amer. Mining and Metallurgical Society of America. 
 
 Min. & Sci. Pr. Mining and Scientific Press. 
 
 Min. Jour. The Mining Journal (London) 
 
 Min. Mag. The Mining Magazine. 
 
 Min. Mag. (N. Y.) Mining Magazine (New York). 
 
 Min. Rept.-* Mining Reporter. 
 
 Min. Sci. Mining Science. 
 
 Min. Wld. Index. Mining World Index of Current Literature. 
 
 Mines & Meth. Mines and Methods. 
 
 Mines & Min. Mines and Minerals. 
 
 Minr. Ind. Mineral Industry. 
 
 Minr. Res. U. S. Mineral Resources of the U. S. 
 
 N. S. W. Mines Dept. Annual Report of the Department of Mines of 
 New South Wales. 
 
 Oesterreischische Zeit. f. B. u. H. Oesterreischische Zeitschrift fur Berg- 
 und Huttenwesen, Vienna. 
 
 Pac. Coast Miner Pacific Coast Miner. 
 
 Phil. Mag. Philosophical Magazine. 
 
 Pop. Sci. M. Popular Science Monthly. 
 
 Roy. Soc. Viet. Proc. Proceedings of the Royal Society of Victoria. 
 
10 MISSOURI SCIIOOI, OF MINI-IS. 
 
 Seh. Mines Quar. School of Mines Quarterly. 
 
 Sci. Amer. Supp. Scientific American Supplement. 
 
 Trclm. Blatter Technische Blatter. 
 
 Trans. Am. Electroch. Soc. Transactions of the American Electrochem- 
 ical Society. 
 
 Trans. Am. Inst. Min. Engrs. Transactions of the American Institute 
 of Mining Engineers. 
 
 Trans. Aust. Inst. Min. Eng. Transactions of the Australasian Institute 
 of Mining Engineers. 
 
 Trans. Instn. Min. & Metl. Transactions of the Institution of Mining 
 and Metallurgy. 
 
 West. Chem. & Metl. Western Chemist and Metallurgist. 
 
 Zeit. Anorg. Chem. Zeitschrift fur Anorganische Chemie. 
 
 Zeit. Phys. Chem. Zeitschrift fur Physikalische Chemie. 
 
 Zts. Oberschles Berg-und Huttenmannisch Zeitschrift Oberschles Berg- 
 und Huttenmannisch. 
 
 The following abbreviations are used for the months of the year: 
 Ja., P., Mr., Ap., My., Je., Jl., Ag., S., O., N,, 1)., 
 
MISSOURI SCHOOL OF MINKS. 11 
 
 BIBLIOGRAPHY 
 
 (References marked with an asterisk are not in the School of Mines 
 
 Library.) 
 
 1 Crane, Walter R. Index of mining engineering literature. 
 2 v. N. Y. 1909-1912. v. 1, p. 61-63; v. 2, p. 33-34. 
 
 2 Hoover, Theodore J. Concentrating ores by flotation. 
 2<1 ed. London. 1914, p. 201-254. 
 
 3 Mineral Industry. N. Y. 1901-1915. v. 19, 1900, p. 784-785; v. 20, 
 1911, p. 862-863; v. 22, 1913, p. 860; v. 23, 1914, p. 847-848. 
 
 GENERAL WORKS. 
 
 4 Barr, James A. Testing for metallurgical processes. 
 1st ed. San Francisco. 1910. p. 153-154; 200. 
 
 5 Canada. Zinc Commission. Report. Ottawa. 1906. 
 Flotation processes, p. 121-128. 
 
 6 Clark, Donald. Australian mining and metallurgy. 1907. 
 p. 397-441. Illus. 
 
 7 Hoover, Theodore J. Concentrating ores by flotation. Being 
 a description and history of a recent metallurgical development, 
 together with a summary of patents and litigation. London. 1914. 
 
 Book reviews in: 
 
 Min. Mag. v. 7, p. 460-461; D. '12; v. 11, p. 207. S. '14. 
 Min. & Sci. Pr. v. 106, p. 164. Ja. '13. 
 *Can. Min. Jour. F. 15, '13. p. 122. 
 
 8 Louis, Henry. The dressing of minerals. 1909. p. 442-449. Illus. 
 
 9 *Newton, P. M., compiler. Flotation processes. Abridgements 
 of the Australian patents and other details. ISp. Melbourne, Vic- 
 toria, 1911. 
 
 10 Richards, Robert H. Ore dressing. 4 v. and index. 2nd ed. N. Y. 
 1906. 
 
 p. 1075-1078; 1555-1565; 1719-1724; 1991-1992. 
 
 11 Rickard, T. A. ed. The flotation process. San Francisco. 1916. 
 Compilation and revision of articles which have appeared in the 
 
 Mining and Scientific Press. Announced for March, 1916. 
 
 12 Walker, T. L. Report on the molybdenum ores of Canada. 
 Ottawa. 1911. p. 11-14. 
 
 ARTICLES IN PERIODICALS. 
 1890. 
 
 13 Criley and Everson oil process. 
 Eng. & Min. Jour. v. 50, p. 581 N. 15, '90. 
 
12 MISSOURI SCHOOL OF MINKS. 
 
 1900 
 
 14 Concentrating antimony ores. 
 
 Eng. & Min. Jour. v. 70, p. 515. N. 3, '00. 
 
 15 Concentration of ores by wet methods. 
 
 Chern. Metl. & Min. Soc. of S. Africa, v. 10, p. 28. Jl., '00. 
 
 16 Greenway, T. J. The concentration of the Broken Hill (N. S. W.) 
 sulphide ores. 
 
 Minr. Ind. v. 9, p. 745-752. 1900. Illus. 
 
 17 McDermott, Walter. Notes on the concentration of finely 
 crushed ores. 
 
 Minr. Ind. v. 9, p. 773-778. 1900. 
 
 18 New concentration process. 
 
 Min. & Sci. Pr. v. 81, p. 278. S. 8, '00. 
 
 19 Notes on the Elmore concentration process. 
 Eng. & Min. Jour. v. 69, p. 742-743. Je. 23, '00. 
 
 An abstract from the "Transactions of Institution of Mining and 
 Metallurgy. Ap. 25, '00. 
 
 20 Rolker, Charles M. Concentration of ores by petroleum. 
 Min. & Sci. Pr. v. 81, p. 40. Jl. 14, '00. 
 
 21 Notes on the Elmore concentration process. 
 Trans. Instn. Min. & Metl. v. 8, p. 379-395. 1900. Illus. 
 
 1901. 
 
 22 Concentration of ores by oil. 
 
 Min. & Sci. Pr. v. 84, p. 230. Ap. 26, '02. 
 
 Min. Jour. v. 70, p. 902. Jl. 21, '00; v. 71, p. 272. Mr. 2, '01. 
 
 26 The Elmore concentrating process 
 
 Eng. & Min. Jour. v. 69, p. 732. Je. 23, '00; v. 70, p. 393. O. 6, '00; 
 p. 63-64. Jl. 21, '00; v. 71, p. 691. Je. 1, '01. Illus. 
 
 24 Milne, David and Godfrey, J. R. Joint report. 
 N. S. W. Mines Dept. 1901. p. 79-81. 
 
 1902 
 
 25 The Elmore oil concentrating process. 
 
 Eng. & Min. Jour. v. 74, p. 371. S. 20, '02. Illus. 
 
 26 McDermott, Walter. The concentrating of ores by oil. 
 Minr. Ind. v. 11, p. 697-707. 1902. Illus. 
 
 27 Milne, David and Godfrey, J. R. Joint report. 
 N. S. W. Mines Dept. 1902. p. 69-72. 
 
 28 Oil process for ore concentration. 
 Min. & Sci. Pr. v. 85, p. 207. O. 11, '02. 
 
 29 The Ore Concentration Syndicate, Ltd. Concentrating molyb- 
 denite. 
 
 Eng. & Min. Jour. v. 74, p. 188. Ag. 9, '02. 
 
MISSOURI SCttOOr, OF MINES. 13 
 
 1903 
 
 30 British Ore Concentration Syndicate, Ltd. 
 Eng. & Min. Jour. v. 75, p. 156. Ja. 24, '03. 
 
 31 The Broken Hill "Salt-Cake Process" for zinky ores. 
 Eng. & Min. Jour. v. 76, p. 692. N. 7, '03. 
 
 32 Concentration by oil. 
 
 Eng. & Min. Jour. v. 75, p. 250. F. 14, '03. 
 
 33 Delprat's method for separating mixed sulphide ores. 
 Eng. & Min. Jour. v. 76, p. 846. D. 5, '03. 
 
 34 Delprat process. 
 
 N. S. W. Mines Dept. 1903. p. 42. 
 Min. & Sci. Pr. v. 87, p. 9. Jl. 4, '03. 
 
 35 Elmore, A. Stanley. Copper sulphide in iron ores. Oil concen- 
 tration. 
 
 Eng. & Min. Jour. v. 76, p. 244. Ag. 15, '03. 
 
 36 The Elmore process. 
 
 Min. & Sci. Pr. v. 86, p. 281. My. 2, '03. Illus. 
 
 37 McDermott, Walter. The concentration of ore by oil. 
 
 Eng. & Min. Jour. v. 75, p. 262-263. F. 14, '03; p. 292-294. F. 21, '03. 
 Illus. 
 
 38 Milne, David and Godfrey, J R. Joint report 
 N. S. W. Mines Dept. 1903. p. 68-71. 
 
 39 Molybdenite Its occurrence, etc. 
 Jour. Can. Min. Inst. v. 6, p. 54. 1903. 
 
 40 Oil concentration. The Elmore process. 
 
 Minr. Ind. v. 9, p. 743-744. 1900; v. 10, p. 759-761. 1901; v. 11, p. 656- 
 657. 1902; v. 12, p. 412-413. 1903. 
 
 41 Results of the oil concentration process. 
 Eng. & Min. Jour. v. 75, p. 113. Ja. 17, '03. 
 
 42 Sancton, Arthur H. Costs in the Elmore process. 
 Min. & Sci. Pr. v. 86, p. 338. My. 23, '03. 
 
 For correction see ibid 87, p. 392. 
 
 43 The Elmore oil-concentration plant. A description of 
 the method and machinery used in concentrating copper ores at 
 St. David's Mine, North Wales. 
 
 Mines & Min. v. 24, p. 6-7. Ag. '03. Illus. 
 
 44 Separation of zinc ores. 
 
 Min. & Sci. Pr. v. 86, p. 118-119. F. 21, '03. 
 
 45 Van Meter, J. W. Aluminated hydro-carbon oil in the concentra- 
 tion and separation of minerals. 
 
 Eng. & Min. Jour. v. 76, p. 820. N. 2?, '03. 
 
14 MISSOURI SCHOOL OF MI\KS. 
 
 4t; Van Meter, J. \\'. A system of eontimious concentration of ores 
 
 by oil. 
 Min. & Sci. Pr. v. 87, p. 304. N. 7, 'o: 1 ,. 
 
 1904 
 
 47 Adams, W. J. Concentration of low-grade copper ores. 
 
 Min. & Sci. Pr. v. 88, p. 315-316. My. 7, '04; p. 328. My. 14, '04; 
 p. 344. My. 21, '04; p. 363-364. My. 28, '04. 
 
 IS Oil concentrating. 
 
 Min. Mag. (X. Y.) v. 10, p. 45-47. Jl. '04. 
 
 40 Bathurst, F. H. Zinc at Broken FTill. 
 
 Kng. & Min. Jour. v. 78, p. 871-S72. D. 1, '04. 
 
 50 Clark, Donald. The Delprat or salt-cake process for mixed sul- 
 phides. 
 
 Eng. Min. Jour. v. 77, p. 122. Ja. 21, '04. 
 
 51 The Potter process. 
 
 Eng. & Min. Jour. v. 78, p. 394. S. 8, '04. Illus. 
 
 52 Elmore, A. Stanley. Concentration of platinum ores. 
 Eng. & Min. Jour. v. 78 p. 438. S. 15, '04. 
 
 53 Hamilton. J. F. The relative attraction of some common min- 
 erals for residuum oil. 
 
 Jour. Can. Min. Inst. v. 7, p. 185-191. Mr. '04. 
 
 54 Laboratory device. 
 
 Min. & Sci. Pr. v. 88, p. 115. F. 13, '04. Illus. 
 
 55 McDermott, Walter. Oil for concentration of ores. 
 Eng. & Min. Jour. v. 77, p. 152-153. Ja. 28, '04. 
 
 56 The Potter sulphide process 
 
 Min. & Sci. Pr. v. 88, p. 361. My. 28, '04. 
 
 57 Ronnan, Fred P. Cheticamp, Cape Breton. 
 Eng. & Min. Jour. v. 77, p. 283-284. F. 18, '04. Illus. 
 
 58 Zinc tailings at Broken Hill. 
 
 Eng. & Min. Jour. v. 78, p. 499. S. 29, '04. 
 
 1905 
 
 59 Broken Hill zinc. 
 
 Kng. & Min. Jour. v. 80, p. 928. N. 18, '05. 
 
 60 *Claudet, H. H. Elmore at Le Roi Mine. 
 B. C. Min. Exch. F. '05. 
 
 61 Elmore, A. Stanley. Concentration of molybdenite ores. 
 Eng. & Min. Jour. v. 80, p. 118. Jl. 22, '05. 
 
 62 Reason for failure of Elmore porcess at Rossland. 
 Can. Min. Rev. v. 24, p. 177. 1905. 
 
MISSOURI SCHOOL OF MINKS. 15 
 
 63 The Elmore process for diamond recovery. 
 
 Eng. & Min. Jour. v. 80, p. 257. Ag. 12, '05. 
 
 Gl Improvements in ore concentration. 
 
 Eng. & Min. Jour. v. 80, p. 643. O. 7, '05. 
 
 G5 Ingalls, W. R. Mixed, sulphide ore treatment. 
 
 Eng. & Min. Jour. v. 80, p. 289-290. Ag. 19, '05. 
 
 66 Le Roi No. 2, Ltd. 
 
 Eng. & Min. Jour. v. 79, p. 201-202. Ja. 26, '05. 
 
 67 Oil concentration. 
 
 Eng. & Min. Jour. v. 80, p. 304. Ag. 19, '05. 
 
 68 Frobert, Frank H. Concentration of copper ore. 
 Eng. & Min. Jour. v. 80, p 15. Jl. 6, '05. Illus. 
 
 G9 Selwyn-Brown, A. The newer 'treatment of Broken Hill sul- 
 
 phides. 
 Eng. & Min. Jour. v. 80, p. 385. S. 2, '05. 
 
 1906 
 
 70 Clark, Donald. The flotation process at Broken Hill. 
 Eng. & Min. Jour. v. 82, p. 966. N. 24, '06. 
 
 71 Concentration at Broken Hill. 
 Min. & Sci. Pr. v. 93, p. 522. N. 3, '06. 
 
 72 Concentration of silicious copper ore. 
 
 Eng. & Min. Jour. v. 81, p. 333-334. F. 17, '06; p. 621-622. Mr. 31, '06. 
 
 73 Huntington, A. K, Flotation processes." 
 
 Eng. & Min. Jour. v. 81, p. 314-317. F. 17, '06. Illus. 
 
 Abstract of a paper read before the Faraday Society, D. 12, '05. 
 
 74 Ingalls, W. R. The flotation processes. Details of the new 
 method of ore separation at Broken Hill. 
 
 Eng. & Min. Jour. v. 82, p. 1113-1115. D. 15, '06. Illus. 
 
 75 The Kirby oil process. 
 
 Eng. & Min. Jour. v. 81, p. 655. Ap. 7, '06. 
 
 76 New Developments at Broken Hill. 
 Electrochem. & Metl. Indust. v. 4, p. 206-207. Je. '06. 
 
 77 New processes at Broken Hill. 
 Min. & Sci. Pr. v. 93, p. 429. O. 13, '06. 
 
 78 Ore dressing by flotation. 
 
 Electrochem. & Metl. Indust. v. 4, p. 49-52. F. '06. 
 An account of two Faraday Society papers by James Swinburne and 
 Dr. G. Rudorf and Professor A. K. Huntington. 
 
 79 *Potter, Delprat, and Defcavay processes. 
 N. S. W. Mines Dept. 1906. p. 37. 
 
 80 Snover, G. E. Native oil concentration in Columbia. 
 Eng. & Min. Jour. v. 82, p. 266. Ag. 11, '06. 
 
16 MISSOURI S( llool, Of-' MI.Xl-S. 
 
 81 Steckel, A. P. Electromagnetic flotation processes. 
 Electrochem. & Metl. Indust. v. 7, p. 275. Je. '06. Illus. 
 
 82 Theory and practice. 
 
 Eng. & Min. Jour. v. 82, p. 1179. D. 22, '06. 
 
 83 Walker, Edward. Zinc concentration in Australia. 
 Eng. & Min. Jour. v. 82, p. 826. N. 3, '06. 
 
 84 Zinc processes at Broken Hill. 
 Min. & Sci. Pr. v. 93, p. 492. O. 27, '06. 
 
 1907 
 
 85 Acid flotation processes. 
 
 Electrochem. & Metl. Indust. v. 5, p. 320-321. Ag. '07. 
 
 86 The Broken Hill Proprietary Company. 
 Eng. & Min. Jour. v. 84, p. 689. O. 12, '07. 
 
 87 Darrow, Wilton E. Concentration of slime. 
 Min. & Sci. Pr. v. 9",. p. 268-269. Ag. 31, '07. 
 
 88 *Debavay, Gillies, Minerals Separation, Elmore ami Delprat 
 processes. 
 
 X. S. W. Mines Dept. 1907. p. 87. 
 
 89 Delprat, Guillaume D. The lead-smelting works of Port Pirie. 
 The ores from the Broken Hill plant are smelted and the bul- 
 lion refined and prepared for the market. 
 
 Eng. & Min. Jour. v. 83, p. 516-519. Mr. 16, 'C7. Illus. 
 
 90 Ore dressing at Broken Hill. Equipment for crush- 
 ing, concentrating and preparing ores for smelting. 
 
 Eng. & Min. Jour. v. 83, p. 317-321. F. 16, '07. Illus. 
 
 91 *Elmore, A. S. The Elmore process. 
 Genie Civil, v. 51, p. 144. 1907. 
 
 Revue de Metallurgie. v. 4, p. 568. 1907. Illus. 
 
 Bulletin de la Societe de L'Industrie Minerale, v. 8, p. 199. 1907. 
 
 92 The Elmore vacuum process. 
 
 Eng. & Min. Jour. v. 83, p. 1110-1111. Je. 8, '07. 
 
 93 The Elmore vacuum process of ore concentration. 
 The apparatus used and the principles governing its operation. 
 Plants installed. 
 
 Mines & Min. v. 28, p. 24-25. Ag. '07. Illus. 
 
 94 Vacuum-flotation process for concentration. The El- 
 more process employs reduced pressure to increase by expan- 
 sion the lifting power of gas bubbles in a liquid medium. 
 
 Eng. & Min. Jour. v. 83, p. 908-909. My. 11, '07. Illus. 
 
 95 Elmore vacuum process of ore concentration. 
 Min. Kept. v. 55, p. 537-538. Je. 13, '07. Illus. 
 
 96 The Elmore vacuum process. 
 
 Eng, & Min. Jour. v. 83, p. 917. My, 11, '07. 
 
MISSOURI SCHOOL OF MINKS. ]/ 
 
 97 Elinore vacuum flotation process. 
 Minr. Ind. v. 16, p. 974-976. 1907. Illus. 
 
 98 Elmore vacuum oil process in Cornwall. 
 Minr. Ind. v. 16, p. 997. 1907. 
 
 99 Gillies' process. 
 
 N. S. W. Mines Dept. 1907. p. 41. 
 
 lOu Gopner, C.. Uber den "Flotation-Prozesz." 
 
 Metallurgie. v. 4, p. 522-530. Ag. 8, '07. Illus. 
 
 101 Haglund, G. Theories concerning the flotation process. 
 Eng. & Min. Jour. v. 83, p. 344. F. 16, '07. 
 
 102 Ingalls, Walter Renton. Concentration upside down. A new 
 process of ore separation based upon a previously unemployed 
 principle of physics. Heavy minerals float, light ones sink. 
 
 Eng. & Min. Jour. v. 84, p. 765-770. O'. 26, '07. Illus. 
 
 103 Progress in the metallurgy of zinc. 
 Ens. & Min. Jour. v. 83, p. 20-21. Ja. 5, '07. 
 
 104 Jackson, F. H. Acid flotation processes at Broken Hill. 
 Min. & Sci, Pr. v. 94, p. 728-730. Je. 8, '07. Illus. 
 
 105 Macquisten's flotation method. 
 Minr. Ind. v. 16, p. 997-999. 1907. Illus. 
 
 106 Prentiss, F. H. The Elmore vacuum flotation process. 
 Eng. & Min. Jour. v. 83, p. 1205. Je. 22, '07. 
 
 107 Vacuum process for concentration of ores. 
 
 Chem. Metl. & Min. Soc. of S. Africa, v. 7, p. 421. Je. '07. 
 
 108 Walker, Edward. The Elmore vacuum flotation process. 
 Eng. & Min. Jour. v. 83, p. 800. Ap. 27, '07. Illus. 
 
 109 The Elmore vacuum process at Dolcoath. The com- 
 plex tin-copper-tungsten ores of Cornwall, heretofore treated with 
 difficulty, are now successfully separated. 
 
 Eng. & Min. Jour. v. 84, p. 1103-1106. D. 14, '07. Illus. 
 
 110 Novel equipment of Tywarnhaile copper mine. Dy- 
 namos driven by producer-gas engines furnish power and the 
 vacuum process serves to concentrate the low-grade ore. 
 
 Eng. & Min. Jour. v. 83, p. 1037. Je. 1, '07. Illus. 
 
 1908. 
 
 111 Claudet, H. H. A few notes on the Elmore vacuum process of 
 ore concentration. 
 
 Journ. Can. Min. Inst. v. 11, p. 460-462. 1908. 
 
 112 Concentration and separation. Flotation methods. 
 Minr. Res. U. S. 1908, Pt 1, p. 251-25b. 
 
 Review 1908, 
 
18 .MISSOURI SCHOOL OF MINKS. 
 
 113 Concentration problem at Dolcoath. 
 Min. & Sci. Pr. v. 97, p. 315-316. S. 5, '08. 
 
 114 Debavay Company. 
 
 N. S. W. Mines Dept. 1908. p. 38-39. 
 
 115 Delprat, G. D. Flotation processes at Broken Hill. 
 Min. & Sci. Pr. v. 97, p. 84. Jl. 18, '08. 
 
 116 Financial side of the Elmore process at Broken Hill. 
 Minr. Ind. v. 17, p. 951-953. 1908. 
 
 117 Flotation processes at Broken Hill. 
 Min. & Sci. Pr. v. 96, p. 494. Ap. 11, '08. Illus. 
 
 118 Golconda, Nevada. An interesting concentrator. Gravity not 
 used. Description of apparatus. Excellent results. 
 
 Min. & Sci. Pr. v. 96, p. 414. Mr. 28, '08. 
 
 119 *Gopner, C. Elmore process. 
 
 Bulletin de L'Industrie Minerale. v. 8, p. 789. 1908. 
 
 120 Die Eizkonzentration nach Elmore. 
 .Metallurgie. v. 5, p. 1-7. Ja .8, '08. Illus. p. 45-50. Ja. 22, '08; 
 
 p. 288. My. 22, '08. 
 
 121 Die finanzielle Seite des Elmore-Verfahrens fur die 
 Broken Hill tailings. 
 
 Metallurgie. v. 5, p. 609-611. O. 22, '08. 
 
 122 Neuere Mitteilungen iiber die Gewinnung von Zink- 
 konzentraten aus den Broken Hill Tailings. 
 
 Metallurige. v. 5, p. 128-130. F. 22, '08. 
 
 123 Haywood, Bryan. The Elmore vacuum process. 
 West. Chem. & Metl. v. 4, p. 100-104. Mr. '08. Illus. 
 
 124 Ingalls, W. R. The development of the Delprat and Potter 
 flotation processes. 
 
 Eng. & Min. Jour. v. 86, p. 175. Jl. 25, '08. 
 
 125 The improved Macquisten tube. 
 Eng. & Min. Jour. v. 86, p. 23. Jl. 4, '08. Illus. 
 
 126 Linde, R. Das Schwemmverfahren zur Erzanreicherung von 
 Elmore. 
 
 Metallurgie. v. 5, p. 87-96. F. 8, '08. Illus. 
 
 127 Nicholas, Francis C. A novel graphite washing plant. 
 Min. Wld. v. 28, p. 18. Ja. 4, '08. 
 
 128 Ore dressing. 
 
 Electrochem. & Metl. Indust. v. G, p. 174. My. '08. 
 
 129 Ore dressing. With special reference to oil concentration. 
 Electrochem. & Metal. Indust. v. 6, p. 185-189. My. '08,.. Illus. 
 
 130 Plummer, John. The method of extracting zinc in Australia. 
 Min. Wld. v. 29, p, 711-712. N. 7, '08. Illus. 
 
MISSOURI SCHOOL OF MINKS. 19 
 
 131 Schwimmprozesso. 
 
 Metallurgie. v. 5, p. 297-298. My. 22, '08. 
 
 132 *Selwyn-Brown, A. Macquisten flotation process. 
 Can. Min. Jour. O. 15, '08. 
 
 133 Storen, R. Method of drying oil concentrates. 
 Eng. & Min. Jour. v. 85, p. 1151. Je. 6, '08. 
 
 134 Ore dressing by adhesion of liquid films. Princi- 
 ples of Elmore process and other systems based upon surface 
 tension and the property of minerals to attract or repel different 
 liquids. 
 
 Eng. & Min. Jour. v. 86, p. 839-842. O. 31, '08. 
 
 135 Sulman, H. L. A method of settling slime. Discussion. 
 Inst. Min. & Metl. Bulletin No. 42. Mr. 12, '08. 
 
 136 Swart, W. G. Present status of art of ore dressing. 
 West. Chem. & Metl. v. 4, p. 69-76. Mr. '08. 
 
 137 Zinc Corporation. The Elmore process. 
 Min. & Sci. Pr. v. 96, p. 280. F. 29, '08. Map. 
 
 1909. 
 
 138 Amalgamated Zinc (Debavay's). 
 Min. Mag. v. 1, p. 239. N. '09. 
 
 139 Amalgamated Zinc (Debavay's), Ltd. 
 Min. Jour. v. 87, p. 182. O. 30, '09. 
 
 140 ^Barclay, A. Elmore process. 
 
 Journal of the British Federated Society of Mining Students, 
 v. 2, p. 153. Je. '09. Illus. 
 
 141 Bennett, W. E. Ore reduction at the Telemarken Copper Mine, 
 Norway. 
 
 Min. Jour. v. 85, p. 335-336. Mr. 13, '09. Illus. 
 
 142 Broken Hill slime. 
 
 Min. Mag. v. 1., p. 261. D. '09. 
 
 143 Caucasus Copper Co., Ltd. (Murgne Gorge, district of Artvin, 
 Government of Kutais, near Dzansul, Caucasus, Russia.) 
 
 Min. Jour. v. 87, p. 111-112. O. 16, '09. 
 
 144 *Clark, Donald. Horwood process for sulphide ores. 
 Aust. Min. Stand, v. 42, p. 498, 519. 1909. Illus. 
 
 145 Debavay flotation process. 
 
 Min. & Sci. Pr. v. 99, p. 725. N. 27, '09. 
 
 146 *Descroix, L. The Elmore vacuum process of mineral con- 
 centration and its results. 
 
 Revue de Metallurgie. v. 6, p. 1060. 1909. Illus. 
 
20 MISSni'Kl SfllOdl. OF MINKS. 
 
 147 Elniore, A. Stanley. Elmore vacuum process applied to puri- 
 fication of tin ore and tin concentrates in England, Straits Set- 
 tlements, and South Africa. 
 
 Mill. Jour. v. 86, p. 267-268. Ag. 28, 'n!. 
 
 148 Elmore vacuum process at Broken Hill, New South 
 Wales. 
 
 Min. Jour. v. 85, p. 234-236. F. 20, '09. Illus. 
 
 149 Notes on various applications of the Elmore vacuum 
 process. 
 
 Eng. & Min. Jour. v. 87, p. 1275-127G. Je. 26, '09. 
 
 150 Elmore vacuum plant. 
 
 Min. & Sci. Pr. v. 98, p. 391-392. Mr. 13, '09. Illus. 
 
 151 The history of the flotation processes. 
 Min. Mag. v. 1, p. 61-64. S. '09. Illus. 
 
 152 Hoover, H. C. Elmore process as applied by Zinc Corpora- 
 tion. Present earnings about 6000 per month; large supply of 
 material for future treatment; description of works and method 
 of treatment. Treatment cost 5/7. 08d per ton. 
 
 Eng. & Min. Jour. v. 88, p. 205-207. Jl. 31, '09. Illus. 
 
 153 The Horwood process. 
 
 Min. Jour. v. 87, p. 410. D. 11, '09. 
 
 154 Kendall separator. 
 
 Min. Wld. v. 30, p. 634. Ap. 3, '09. 
 
 155 Levy, Ernest. Murex magnetic process. 
 Min. & Sci. Pr. v. 99, p. 777-778. D. 4, '09. 
 
 156 Linde, R. Die Elmoresche Schwemmanlage zur Erzanreicherung 
 in Brokenhill, Australien. 
 
 Metallurgie. v. 6, p. 486-490. Ag. 8, '09. Illus. 
 
 157 Murex magnetic concentration process. 
 Min. & Sci. Pr. v. 98, p. 757. My. 29, '09. 
 Eng. & Min. Jour. v. 88, p. 371. Ag. 21, '09. 
 
 158 The Murex magnetic process. The concentration of ores by 
 a wet method. 
 
 Min. Jour. v. 85, p. 565. My. 1, '09. Illus. 
 
 159 Nichols, Horace G. Treatment of slime. 
 Min. Mag. v. 1, p. 221-224. N. '09. Illus. 
 
 I HO Ore Concentration Co. (1905), Ltd. (Broken Hill processes.) 
 
 Min. Jour. v. 86, p. 41. Jl. 3, '09. 
 
 161 Pegg, Arthur J. The Murex magnetic process. 
 Min. Jour. v. 85, p. 591. My. 8, '09. 
 
 162 Plummer, John. The Broken Hill Sulphide Corporation. 
 Min. Wld. v. 31, p. 420-421. Ag. 21, '09. Illus. 
 
MISSOURI SCIIOOI, OF MINIMS. 21 
 
 163 *Poole, W. Treatment of Broken Hill ores. 
 Queensland Govt. Mining Jour. Ja. 15, F. 15, Mr. 15, '09. 
 
 164 The Sanders flotation process. 
 
 Eng. & Min. Jour. v. 87, p. 844. Ap. 24, '09. Illus. 
 
 165 Selwyn-Brown. A. Macquisten process of flotation. 
 Chem. Metl. & Min. Soc. of S. Africa, v. 9, p. 411. My. '09. 
 
 166 Sewell, Francis W. Concentration of ores by the flotation 
 process. 
 
 Mex. Min. Jour. v. 8, p. 18-21. Mr. '09. Illus. 
 
 167 Stocker, J. The Elmore process at Cobar. 
 Eng. & Min. Jour. v. 87, p. 177. Ja. 16, '09. 
 
 168 - Vacuum oil process in the Cobar Gold Mine. 
 Min. Jour. v. 85, p. 281. F. 27, '09.. 
 
 169 Walker, Edward. The history of the flotation processes. 
 West. Chem, & Metl. v. 5, p. 469-475. D. '09. 
 
 170 Zinc mining in foreign countries. 
 
 Minr. Ind. v. 17, p. 856-864. 1908; v. 18, p. 713-723. 1909. 
 
 1910. 
 
 171 Amalgamated Zinc (Debavay's). 
 Min. Mag. v. 3, p. 139-140. Ag. '10. 
 
 172 Carthew, J. and Sawyer, B. Joint report. 
 
 N. S. W. Mines Dept. 1909. p. 95-106; 191 Orp. 86; 1911, p. 94. 
 
 173 Clark, Donald. Horwood process for separating zinc sulphides. 
 Blende separated from other minerals by a combination of par- 
 tial roasting and oil flotation: Successful separation of intimate 
 mixtures. 
 
 Eng. & Min. Jour. v. 89, p. 460-461. F. 26, '10. Illus. 
 
 174 Treatment of complex sulphides. 
 Min. Mag. v. 2, p. 56-58. Ja. '10. Illus. 
 
 175 Concentration and separation. Flotation methods. 
 Minr. Res. U. S. 1910, Pt. 1, p. 278-279. 
 
 Review 1910. 
 
 176 The Debavay mill. 
 
 Min. Jour. v. 89, p. 551-552. Ap. 30, '10. 
 
 177 Flotation of zinc ores. 
 
 Metl. & Chem. Engng. v. 8, p. 205. Ap. '10. 
 
 178 Flotation process at Broken Hill. 
 Min. & Sci. Pr. v. 101, p. 583. O. 29, '10. 
 
 179 Flotation process for the concentration of tin ores. 
 Metl. & Chem. Engng. v. 8, p. 204, Ap. '10. 
 
) ) 
 
 MISSOURI SCHOOL OK MINKS. 
 
 180 Flotation processes. Sulphide Corporation Sulitjelma Copper. 
 Min. & Sri. Pr. v. Kill. p. SiiC. My. 2S, '10. 
 
 181 Flotation processes. Vacuum concentration at Sulitjelma, 
 Norway. 
 
 Minr. Ind. v. 19, p. 762-7G4. 1910. 
 
 182 Flotation. The Amalgamated Zinc (Debavay's) new mill at 
 Broken Hill. 
 
 Min. Mas. v. 2, p. 34S-349. My. '10. 
 
 is:; Holmsen, Holm & Rees, H. N. Vacuum-concentration at Suli- 
 
 telma. 
 Min. Mag. v. 2, p. :!77-:!80. My. '10. Illus. 
 
 IS I -Hoover, T. ^. Oil liotation at Broken Hill. 
 
 Aus). Min. Stand, v. 44, p. 63. 1910. 
 
 isr> Oil flotation process at Broken Hill, N. S. W. Zinc 
 
 and lead sulphides are collected in a froth and floated off; high- 
 est recovery is made from slime. Total cost, $1.84 per ton. 
 Eng. & Min. Jour. v. 89, p. 913-917. Ap. 30, '10. Illus. 
 
 186 - Smelting briquetted zinc ore. 
 Eng. & Min. Jour. v. 90, p. 323-321. Ag. 13, '10. 
 
 187 Hoover flotation apparatus. 
 
 Eng. & Min. Jour. v. 90, p. 123. Jl. 16, '10. Illus. 
 
 188 Horwood's process for the separation of zinc blende from other 
 sulphides. 
 
 Min. Jour. v. 88, p. 342. Mr. 19, '10. 
 
 189 Interesting magnetic-concentration process. 
 Min. & Sci. Pr. v. 101, p. 646. N. 12, '10. 
 
 190 McDermott, Walter. The elements of slime concentration. 
 Trans. Instn. Min. & Metl. v. 19, p. 400-431. Ap. 21, '10. 
 
 191 The Macquisten concentrating process. 
 
 Eng. & Min. Jour. v. 89, p. 659. Mr. 26, '10. Illus. 
 
 192 The Murex magnetic process. 
 Min. Mag. v. 1, p. 142-143. O. '09. 
 
 Kng. & Min. Jour. v. 89, p. l.~>7. Ja. lf>, '10. 
 
 193 The new Potter process. 
 Min. Mag. v. 2, p. 205. Mr. '10. 
 
 194 Oil processes. 
 
 Min. Mag. v. 2, p. 337-338. My. '10. 
 
 195 Plummer, John. Ore treatment at Broken Hill. 
 Min. Wld. v. 33, p. 458. S. 10, '10. 
 
 196 Potter process. 
 
 Eng. & Min. Jour. v. 81, p. 1000. My. 26, '06. 
 N. S. W. Mines Dept. 1903. p. 42; 1907, p. 41. 
 Metl. & Chem. Engng. v. 8, p. 498-499. Ag. '10. 
 
MISSOURI SCHOOL OF MINES. 23 
 
 197 Simpson, W. E. Oil in the Potter process. 
 Min. Mag. v. 2, p. 434-436. Je. '10. 
 
 198 Simpson, W. E. Oil in the Potter (ore-flotation) process. 
 Jour. Soc. Chem. Indust. v. 29, p. 823-824. Jl. 15, '10. 
 
 199 Use of acid in flotation processes. 
 Min. Wld. v. 32, p. 712. Ap. 2, '10. 
 
 200 Zinc at Broken Hill. 
 
 Min. Mag. v. 3, p. 330-332. N. '10. 
 
 201 Zinc metallurgy. 
 
 Min. Mag. v. 2, p. 8-9. Ja. '10. 
 
 1911. 
 
 202 Amalgamated Zinc (Debavay's).' 
 Aust. Min. Stand, v. 46, p. 56. Jl. 20, '11. 
 
 203 Bastin, E. S. Graphite deposits, mining, and milling, Alabama. 
 Min. & Eng. Wld. v. 35, p. 157-158. Jl. 22, '11. Illus. 
 
 204 British Broken Hill Proprietary Co., Ltd. 
 Min. Jour. v. 93, p. 488. My. 6, '11. 
 
 205 Broken Hill. 
 
 Min. Mag. v. 5, p. 274-276. O. '11. Illus. 
 
 206 Broken Hill prospects. Block 10 ore. British zinc flotation 
 plant. 
 
 Aust. Min. Stand, v. 45, p. 244. Mr. 8, '11. 
 
 207 Broken Hill prospects. Clarke's slime treatment process. 
 Aust. Min. Stand, v. 45, p. 218-219. Mr. 1, '11. 
 
 208 Broken Hill prospects. Flotation at the Junction North. Junc- 
 tion and Junction North Amalgamation. 
 
 Aust. Min. Stand, v. 45, p. 340. Ap. 5, '11. 
 
 209 Broken Hill prospects. Murex process. 
 Aust. Min. Stand, v. 45, p. 116. F. 1, '11. 
 
 210 Broken Hill prospects. Tailings treatment. 
 Aust. Min. Stand, v. 45, p. 159. F. 15, '11. 
 
 211 Broken Hill prospects. Zinc Corporation's profits. 
 Aust. Min. Stand, v. 45, p. 365-366. Ap. 12, '11. 
 
 212 Concentration and separation . 
 Minr. Res. U. S. 1911, Pt. 1, p. 371-372. 
 Progress 1911. 
 
 213 Crocker, J. Flotation at Zinc Corporation. 
 Eng. & Min. Jour. v. 92, p. 1259. D. 30, '11. 
 
 214 *Donaldson, R. J. Central mine plant. 
 Min. & Eng. Rev. Ag. and S. '11, p. 771. 
 
J4 M ISSUTKI SCHOOL "I- M INKS. 
 
 215 The economic importance of the lead-zinc ore deposits of the 
 world. 
 
 Min. Jour. v. 94, p. 865-866. Ag. 26, '11. 
 
 216 *Elmore, A. S. Elmore vacuum oil process at Broken Hill. 
 Gliickauf. v. 45, p. 846. 
 
 217 Eucalyptus oil. 
 
 Min. Jour. v. 94, p. 931. S. 23, '11. 
 
 218 Eucalyptus oil and mineral flotation. 
 Aust. Min. Stand, v. 46, p. 167. Ag. 17, '11. 
 
 219 EucalyDtus oil for mineral flotation. 
 Min. & Sci. Pr. v. 103, p. 556. O. 28, '11. 
 
 220 flotation process in Idaho. 
 
 Metl. & Chem. Engng. v. 9, p. 567. N. '11. 
 
 221 dotation processes. Experiments on mineral flotation. 
 Minr. Ind. v. 20, p. <s:;i-s:!7. 1911. 
 
 222 Guess, H. A. Progress in ore dressing in United States and 
 Mexico during 1910. Water concentration. 
 
 Metl. & Chem. Engng. v. 9, p. 36-38. Ja. '11. 
 
 223 Ingalls, W. R. The problem of mixed sulphide ores. 
 Aust. Min. Stand, v. 46, p. 522-523. N. 23, '11. 
 
 224 Macquisten tube concentrator . 
 
 Salt Lake Min. Rev. v. 13, p. 24. My. 30, '11. 
 
 225 Macquisten tubes in Idaho. 
 
 Metl. & Chem. Engng. v. 9, p. 236. My. '11. 
 Min. & Sci. Pr. v. 102, p. 693-694. My. 20, '11. 
 
 226 Mickle, Kenneth A. Experiments on mineral flotation. 
 Eng. & Min. Jour. v. 92, p. 307-310. Ag. 12, '11. 
 
 Abstracted from Proceedings of the Royal Society of Victoria, 
 v. XXIII (N. S.), Pt. 2, March, 1911. 
 
 227 Mickle, K. A. Experiments on mineral flotation. Flotation in 
 water. Cold water. 
 
 Metl. & Min. Soc. of S. Africa, v. 12, p. 136-141. O. '11. 
 
 228 Minerals Separation, Ltd. 
 
 Min. Jour. v. 87, p. 317-320. N. 20, '09; v. 91, p. 1535-1538. D. 31, 
 
 '10; v. 95, p. 1299-1303. D. 30, '11; v. 97, p. 361. Ap. 13, '12. 
 N. S. W. Mines Dept. 1908. p. 38-39. 
 Aust. Min. Stand, v. 45, p. 142. F. 8, '11. 
 
 229 Mining in New South Wales. Broken Hill. 
 Aust. Min. Stand, v. 46, p. 363. O. 12, '11. 
 
 230 Mining in Western Australia^ Coolgardie Field. Hill's Pro- 
 prietary. Large flotation. 
 
 Aust. Min. Stand, v. 45,v p. 186. F. 22, '11. 
 
MISSOURI SCHOOL OF MINKS. 25 
 
 231 Mitchell, D. P. Flotation at Zinc Corporation, Ltd. 
 Eng. & Min. Jour. v. 92, p. 994-997. N. 19, '11. Illus. 
 
 232 *Moldenhauer, Max. Comparison and history of Elmore and 
 other flotation processes. 
 
 Oesterreichesche f. B. u. H. S. 16, '11. p. 513. 
 
 233 Murex process at Broken Hill. 
 
 Min. & Sci. Pr. v. 103, p. 177. Ag. 5, '11. 
 
 234 *Newton, P. M. Flotation process and patents. 
 Min. & Eng. Rev. v. 3, p. 211; 233. 1911. 
 
 235 *Newton, P. M. Sequence of patents. 
 Austral. Min. & Eng. Rev. F. 6, '11. 
 
 236 Nutter, Edward H. The flotation processes. 
 Eng. & Min. Jour. v. 91, p. 946. My. 13, '11. 
 
 237 Ore Concentration Co. 
 
 Aust. Min. Stand, v. 45, p. 416. Ap. 27, '11. 
 
 238 Poole, W. Treatment of Broken Hill ores. Methods of grind- 
 ing. Concentrating by the magnetic, the ffotation and the oil 
 processes. 
 
 Mines & Min. v. 32, p. 227-233. N. '11. Illus. 
 
 239 Scott, W. A. Tube concentrator in the Coeur d'Alene. 
 Min. & Sci. Pr. v. 103, p. 809. D. 23, '11. 
 
 240 Siebenthal, C. E. Some new phases of zinc metallurgy. 
 Min. Sci. v. 64, p. 518-519. D. 7, '11. 
 
 241 Sulman, H. Livingstone. Modern zinc problems. 
 
 Min. & Sci. Pr. v. 102, p. 518-520. Ap. 15, '11; 583-587. Ap. 29, '11. 
 Metl. & Chem. Engng. v. 9, p. 323-324. Je. '11. Illus. 
 
 242 Presidential address. 
 
 Trans. Instn. Min. & Metl. v. 20, p. 35-66. Mr. 22, '11. 
 
 243 Sulphide Corporation, Ltd. 
 
 Min. Jour. v. 91, p. 1493-1494. D. 24, '10. 
 Min. Mag. v. 4, p. 202. Mr. '11. 
 
 244 "Treatment of mixed sulphides by the Horwood pro'cess. 
 Aust. Inst. of Min. Engr. Proc. Je. 30, '11. 
 
 245 Walker, Edward. Zinc production in Australia. 
 Min. & Sci. Pr. v. 302, p. 15-17. Ja. 7, '11. Illus. 
 
 246 Walker, T. L. Molybdenum ores; occurrence and uses. 
 Min. & Eng. Wld. v. 35, p. 1277-1279. D. 23, '11. 
 
 247 Wittich, L. L. Magnetic ore separation. 
 Mines & Meth. v. 3, p. 344-345. O. '11. Illus. 
 
 248 Woodbridge, Dwight E. The Orijarvi Mine, Finland. 
 Eng. & Min. Jour. v. 91, p. 759-760. Ap. 15, '11. Illus. 
 
26 MISSOURI SCHOOL I)!' MINKS. 
 
 249 Zinc Corporation. 
 
 Min. & Sci. Pr. v. 95, p. 222-223. Ag. 24, '07; v. 97, p. 232. Ag. 
 
 15, '08. 
 
 X. S. W. Mines Dept. 190S. p. 38-39. 
 
 Kn.u. & Min. Jour. v. 87, p. 219. Ja. 23, '09; v. 97, p. C14. Mr. 21, '14. 
 Min. Mag. v. 2, p. 467-468. Je. '10. Illus. 
 Min. Jour. v. 85, p. 688-689. My. 29, '09; v. 93, p. 326. Ap. 1, '11; 
 
 p. 568-570. My. 27, '11. 
 
 250 The zinc problem. 
 
 Min. Mag. v. 4, p. 258-260. Ap. '11. 
 
 1912 
 
 251 Amalgamated Zinc (Debavay's), Ltd. 
 Min. t Sci. I'r. v. I it.", p. <H5. N. 16, '12. 
 
 252 Ash croft, J. \Y. The flotation process as applied to the con- 
 centration of copper ore at the Kyloe Copper Mine, New South 
 Wales. 
 
 Hull. Instn. Min. & Metl. No. 97. O. 10, '12. Illus. 
 
 Trans. Instn. Min. & Metl. v. 22, p. 3-49. O. 17, '12. Illus. 
 
 An abstract of this paper appears in Eng. & Min. Jour. v. 94, p. 
 
 1085-1088. D. 7, '12. Illus. 
 
 Discussion. Bull. Instn. Min. & Metl. No. 98. N. 14, '12. Illus. 
 Adjourned discussion. Bull. Instn. Min. & Metl. No. 100. Ja. 9, '13. 
 
 253 The flotation process at the Kyloe Copper Mine, 
 
 N. S. W. 
 Min. Jour. v. 99, p. 1082-1084. N. 2, '12. 
 
 254 Flotation process at Kyloe, New South Wales. 
 Can. Min. Jour. v. 33, p. 797. D. 1, '12. Illus. 
 
 255 Copper ore treatment by flotation process. 
 Mines & Meth. v. 4, p. 91-96. D. '12. Illus. 
 
 256 The Hraden Copper Co. 
 
 Min. & Sci. Pr. v. 105, p. 408. S. 28, '12. 
 
 257 Concentration by flotation. 
 
 Min. & Sci. Pr. v. 96, p. 773. Je. 6, '08; v. 106, p. 246. F. 8, '13. 
 Metl. & Chem. Engng. v. 10, p. 191-192. Ap. '12. 
 
 258 Concentration of carnotite by wet and dry methods. 
 Metl. & Chem. Engn. v. 12, p. 89-91. F. '12. 
 
 259 Concentration of molybdenite ores in Australia. 
 Min. & Engng. Wld. v. 37, p. 815. N. 2, '12. Illus. 
 Abstract from the Mining and Engineering Review. 
 
 2GO Concentration. Progress of flotation concentration in the 
 
 United States. 
 
 Minr. Res. U. S. 1912, Pt. 1, p. 392-394. 
 Review 1912. 
 
.MISSOURI SCHOOL OF MINKS. 27 
 
 261 The Debavay process. 
 
 Eng. & Min. Jour. v. 82, p. 344-346. Ag. 25, '06. Illus.; p. 1115. D. 
 
 15, '06. 
 
 N. S. W. Mines Dept. 1907. p. 41. 
 Min. Mag. v. 7, p. 455. D. '12. Illus. 
 
 262 *Dreibrodt, O. Neuer Apparat zur Trennimg der Mineralien von 
 Salzgesteinen mit schweren Flussigkeiten. 
 
 Kali, Jl. 1, '12. p. 314. Illus. 
 
 Separation of saline minerals by flotation in heavy liquids; chiefly 
 in chemical analysis. 
 
 263 Durell, C. T. Flotation of zinc ores. 
 Colo. Sch. Mines Mag. v. 2, p. 199-200. Je. '12. 
 
 264 *E. P. Die Redeutung des Masuts fur die Erzaufbereit. 
 Petroleum, My. 1, '12, p. 831. 
 
 The significance of the Elmore oil flotation process with regard to 
 the utilization of masut and oil refinery wastes. 
 
 265 The evolution of ore flotation. 
 
 Eng. & Min. Jour. v. 94, p. 500. S. 14, '12. 
 
 266 Flotation at Butte and Superior. 
 
 Metl. & Chem. Engng. v. 10, p. 426. Jl. '12. 
 
 267 The froth flotation process. 
 
 Eng. & Min. Jour. v. 94, p. 1071-1072. D. 7, '12. 
 
 268 *Herwegen, Leo. Die Schwimmverfahren, ihre Entwickelung 
 und Bedeutung" fur die Erzaufbereitung. 
 
 Gluckauf, Jl. 27, '12, p. 1185-1194. Ag. 3, '12, p. 1231-1242. Illus. 
 The flotation processes, development and significance in ore dress- 
 ing. 
 English abstract. Min. Jour. v. 98, p. 806. Ag. 10, '12. 
 
 269 Ueber die Bedeutung der Flotationstechnik. 
 Montanist Rundschau, S. 15, '12, p. 965. 
 
 The significance of flotation methods with special reference to Aus- 
 trian ores; read to Bergmannstag, Vienna, S. '12; abstract. 
 
 270 Hofstrand, O. B. The Macquisten-tube flotation process. 
 Trans. Am. Inst. Min. Engrs. v. 43, p. 692-697. My. '12. 
 Bull. Am. Inst. Min. Engrs. Ja. '13. p 73-77. Illus. 
 
 271 *Holtmann, - Das Schwimmaufbereitungsverfahren der 
 Grube Friedrichssegen nach System Leuschner. 
 
 Gluckauf, Mr. 9, '12, p. 388-393. Illus. 
 
 The Leuschner oil-flotation process at the Friedrichssegen Mines 
 
 on the Lahn, Germany; chiefly for chalcopyrite, blende and 
 
 galena. 
 English abstract in Min. Jour. v. 97, p. 402. Ap. 20, '12, 
 
 272 *Hoover, T. J. Zinc corporation. 
 Min. & Eng. Rev. Ag. '12. p. 410. 
 
28 MISSOURI SCUOU!. OL- MINKS. 
 
 273 '! lie Norwood process for mixed sulphides. 
 
 Chem. Engng. v. 10. p. 314. My. '12. 
 
 i'T4 Hyde's flotation process. 
 
 Min. Mag. v. 7, p. 64 Jl. '12. Illus. 
 Eng. & Min. Jour. v. 93, p. 1068. Je. 1, '12. 
 
 275 Inouye, Tadashiro. Flotation of zinc ores in Japan. 
 Min. & Sci. Pr. v. 104, p. 892-893. Je. 29, '12. 
 
 276 The Leuschner flotation process. 
 
 Eng. & Min. Jour. v. 93, p. 924. My. 11, '12. v. 94, p. 581-582, 
 
 S. 28, '12. Illus. 
 
 Min. & Engng. Wld. v. 37, p. 480. S. 14, '12. 
 
 Min. Mag. v. 6, p. 377-378. My. '12. Illus. 
 
 277 The Leuschner flotation process for the reduction of sulphide 
 ores. 
 
 Min. Jour. v. 97, p. 402. Ap. 20, '12. 
 
 278 McClave, James M. Recent developments in zinc ore dress- 
 ing. Progress made in inventions bearing on the problems of 
 grinding, sizing, and separation according to various principles. 
 
 Advance of flotation methods. 
 
 Min. Sci. v. 65, p. 90-91. Ja. 25, '12. 
 
 279 The Macquisten tube. 
 Min. Mag. v. 6, p. 32-33. Ja. '12. 
 
 280 Macquisten tube mill. 
 
 Mines & Meth. v. 3, p. 406. F. '12. 
 
 281 Metallurgy of molybdenum. 
 
 AIH1. & Chem. Engng. v. 10, p. 110-111. F. '12. 
 
 282 *Meuskens, Cl. Das Schwimmverfahren der Mineral Separation 
 Ltd. 
 
 Techn. Blatter. S. 21, '12. p. 297. Illus. 
 
 Flotation process of Minerals Separation, Ltd. for copper, zinc, 
 molybdenum and silver-gold ores. 
 
 283 fickle, Kenneth A. Flotation of minerals. 
 
 Atist. Min. Stand, v. 45, p. 343. Ap. 5, '11; p. 368-369. Ap. 12, '11; 
 
 p. 394-396. Ap. 20, '11; p. 416. Ap. 27, '11. v. 47, p. 333. Ap. 
 
 11, '12; p. 357. Ap. 18, '12; p. 381-382. Ap. 25, '12; p. 403-404. 
 
 My. 2, '12. 
 
 Eng. & Min. Jour. v. 94, p. 71-76. Jl. 13, '12. 
 
 Metl. & Chem. Engng. v. 9, p. 426-427. Ag. '11. 
 
 284 Flotation of minerals. 
 
 Min. & Sci. Pr. v. 105, p. 12-14. Jl. 6, '12. Illus. 
 
 Abstract from a paper read before the Royal Society of Victoria 
 and reported in the Australian Mining Standard. 
 
MISSOURI SC1IOOI, OF MINKS. 29 
 
 285 Flotation of minerals. 
 
 *Roy. Soc. of Victoria, v. 23, p. 555-585. Mr. '11; v. 24, p. 301-330. 
 Mr. '12. Illus. 
 
 Reprinted in Aust. Min. Stand. Ap. 11, '12, p. 333; Ap. 18, '12, p. 
 357; Ap. 25, '12, p. 381; My. 2, '12, p. 403. Illus. 
 
 Special reference to tests on Broken Hill, N. S. W. ores and con- 
 centrates. 
 
 286 Minerals Separation and Debavay processes. Australia Pro- 
 prietary, Limited. 
 
 Min. Jour. v. 98, p. 821. Ag. 17, '12. 
 
 287 Mining in the Coeur d'Alene. 
 
 Eng. & Min. Jour. v. 93, p. 16. Ja. 6, '12. 
 
 288 Moldenhauer, Max. Das Filter bei der Aufbereitung feiner 
 sulfidischer Sande und Schlamme. 
 
 Metallurgie. v. 9, p. 99-102. F. 8, '12. ' Illus. 
 
 289 Die Methoden der schwimmverfahren in der Erzauf- 
 bereitung. 
 
 Metellurgie. v. 9, p. 72-80. Ja. 22, '12. Illus. 
 Review of flotation methods in ore dressing. 
 
 290 Murex Magnetic Co., Ltd. 
 
 Min. Jour. v. 86, p. 128-131. Jl. 24, '09; v. 87, p. 424. D. 11, '09; 
 
 v. 91, p. 1241-1243. O. 22, '10; v. 93, p. 336. Ap. 1, '11; v. 94, p. 
 
 880. S. 2, '11. 
 
 Min. Mag. v. 9, p. 17-19, Jl. '13. 
 Min. & Sci. Pr. v. 104, p. 393. Mr. 9, '12. 
 
 291 Murex process. 
 
 Min. & Sci. Pr. v. 98, p. 775. Je 5, '09. 
 
 *Aust. Min. Stand, v. 42, p. 309. 1909; v. 45, p. 284. Mr. 22, '11. 
 
 Min. Mag. v. 1, p. 220. N. '09. 
 
 Eng. & Min. Jour. v. 94, p. 1074. D. 7, '12. 
 
 292 The Murex process at Cordoba. 
 
 Min. & Sci. Pr. v. 104, p. 466. Mr. 30, '12.. 
 
 293 Notes on the Elmore process. 
 
 Mex. Min. Jour. v. 14, p. 23-24. My. '12. Illus. 
 
 294 Oil flotation plant of the Butte and Superior. 
 Min. & Sci. Pr. v. 104, p. 706. My. 18, '12. 
 
 295 Oil flotation process. Elmore annual report. Minerals Separa- 
 tion statement. Results with the Murex magnetic process.- 
 The Cordoba Copper Mine. 
 
 Min. & Sci. Pr. v. 104, p. 350-351. Mr. 2, '12. Illus. 
 
 296 Ore concentration. 
 
 Min Mag. v. 6, p. 78. Ja. '12. 
 
 297 Parmelee, H. C. Concentration by flotation of dry. ore pulp, 
 Metl. & Chem. Engng. v. 10, p. 132-135. Mr. '12. Illus. 
 
30 .MISXirui SCHOOL, OF MINKS. 
 
 2C8 Processes and publicity. 
 
 Min Mag. v. 7, p. 328-329. N. ? 12. 
 
 299 Frogress of the zinc industry. 
 
 Min. & Sci. Pr. v. 104, p. 587. Ap. 27, '12. 
 
 300 Schneider, George W. Concentration at the Butte Superior Mill. 
 Mines & Min. v. 33, p. 160. O. '12. 
 
 301 ^Scholtze, G. Da^ Flotations-Schwimmverfahren zum Aufbe- 
 reiten armer Erze und Schlamme. 
 
 Kohle & Erz, Ag. 5, '12. p. 803. 
 
 Flotation process for treating low-grade ores and slimes. 
 
 302 Die Schwimmverfahren, ihre Entwicklung und Beteutung fur 
 die Erzaufbereitung. 
 
 Metall und Erz. v. 10 (N. F. I.), p. 88-90. N. 8, '12. Illus. 
 
 303 Separation of zinc and lead sulphides in slime by flotation 
 processes. 
 
 Min. Mag. v. 7, p. 63-64. Jl. '12. 
 
 304 :: Shellshear, W. Slime settlement. 
 
 Proc. Aust. Inst. Mg. Engrs. Supplement No. 3. D. 31, '12. Illus. 
 
 oil.") * Smith, H. Hardy. Minerals Separations flotation plant at Kyloe 
 
 Copper Mines, N. L. 
 Proc. Aust. Inst. Mg. Engrs. New Series No. 7, S. 3D, '12. Supple- 
 
 ment No. 2, S. 30, '12. Illus. 
 Excerpt in Metl. & Chem. Engng. v. 11, p. 131-136. Mr. '13. Illus. 
 
 306 Wood, Henry E. Concentration of molybdenite ores. 
 
 Eng. & Min. Jour. v. 93, p. 227-228. Ja. 27, '12. Illus. 
 
 :'.i7 Separation of sulphides by water flotation. Descrip- 
 
 tion of the Henry E. Wood process. Account of author's expe- 
 rience during the last seventeen years. Report upon numerous 
 observations. 
 Min. Sci. v. 66, p. 392-394. D. '12; p. 412-433, D. 26, '12. Illus. 
 
 The Wood flotation process. 
 
 Bull. Am. Inst. Min. Engrs. O. '12. p. 1227-1244. Illus. 
 Trans. Am. Inst. Min. Engrs. v. 44, p. 684-701. 1912. Illus. 
 
 1913 
 
 309 Australasian Institute of Mining Engineers. The Broken Hill 
 Congress. 
 
 Aust. Min. Stand, v. 49, p. 467-476. Je. 5, '13. Illus. 
 
 310 *Bousquet, G. Du Flottage des Minerals. 
 L'Echo des Mines, Jl. 17, '13, p. 823. 
 
 On the flotation of ores. Abstract from Soc. des Ingenieurs Civil. 
 
 311 Procides de preparation mechanique des minerals 
 par flottage. 
 
 Bulletin Societe Ingenieurs Civils de France. Je. '13. Illus. 
 
MISSOURI SCHOOL, OF MINES. 
 
 312 Eullock, Stanley C. Description of a modern lead concentrat- 
 ing mill, Broken Hill Junction North Mine, N. S. W. 
 
 Bull. Instn. Min. & Metl. No. 100. Ja. 9, '13. Illus. 
 Discussion. Bui. Instn. Min. & Metl. No. 101. F. 13, '13. 
 
 313 The Butte and Superior concentrating plant. 
 Min. & Sci. Pr. v. 106, p. 952-953. Je. 21, '13. 
 
 314 Butte and Superior Copper Company, Ltd. 
 Min. & Sci. Pr. v. 106, p. 926-927. Je. 14, '13. 
 
 315 Campbell, Donald G. A study of ore flotation. 
 Sch. Mines Quar. v. 35, p. 28-34. N. '13. 
 
 316 *Eddingfield, F. T. Gogo and its effect on gold and gold solu- 
 tions. 
 
 Phil. Jnl. Sci. Ap. '13. p. 135. 
 
 Gogo (plant) juice is used by Philippine natives in panning gold- 
 bearing sands. 
 
 317 Elmore process. 
 
 N. S. W. Mines Dept. 1907. p. 41; 43. 
 
 Mex. Min. Jour. v. 17, p. 432-434. S. '13. Illus. 
 
 318 Falkenberg, Otto. The Murex process in Germany. 
 Min. Jour. v. 100, p. 101-102. Ja. 25, '13. 
 
 Abstract from the Teknisk Ukeblad. 
 
 319 Fischer, Siegfried. The carnotite industry. 
 
 Trans. Am., Electroch. Soc. v. 24, p. 361-375. S. 11, '13. Illus. 
 
 320 Flotation and copper ores. 
 
 Min. & Sci. Pr. v. 106, p. 574-575. Ap. 19, '13. 
 
 321 Flotation at Great Cobar. 
 
 Min. & Sci. Pr. v. 106, p. 284. F. 15, '13. 
 
 322 Flotation methods. 
 
 Min. & Sci. Pr. v. 106, p. 96. Ja. 11, '13. 
 
 323 Flotation of copper sulphide slime in Australia. 
 Min. Sci. v. 67, p. 203-205. Ap. '13. Illus. 
 
 324 Flotation of gold-copper ore. 
 
 Metl. & Chem. Engng. v. 11, p. 484. S. '13. 
 
 325 The flotation of minerals. 
 
 Chem. Metl. & Min. Soc. of S. Africa, v. 13, p. 438-439. Mr. '13. 
 Illus. 
 
 326 Flotation of Minerals. "Agitation froth" process. 
 Metl. & Chem. Engng. v. 11, p. 53. Ja. '13. 
 
 327 Flotation process for silver ores. 
 
 Min. Jour. v. 103, p. 1081-1082. N. 15, '13. Illus. 
 
32 MISSOURI SCHOOL OF MINKS. 
 
 328 Flotation processes. 
 
 Minr. Ind. v. 12, p. 358-359. 1903. v. 21, p. 960-982. 1912. Illus. 
 Aust. Min. Stand, v. 45, p. 566. Je. 8, '11. 
 Min. Mag. v. 4, p. 332-333. My. '11; v. 11, p. 26-27. Jl. '14. 
 Min. & Sci. Pr. v. 105, p. 8 ! )4. D. 21, '12; v. 106, p. 55. Ja. 4, '13. 
 Illus. v. 107, p. 175. Ag. 2, '13. 
 
 329 Flotation processes at Broken Hill. 
 Eng. & Min. Jour. v. 9G, p. 583. S. 27, '13. 
 
 330 Flotation processes of ore concentration. 
 
 Min. & Metl. Soc. Amer. Bulletin 67, p. 312-323.. D. 31, '13. 
 
 331 Flotation tests at Braden. 
 
 Eng. & Min. Jour. v. 95, p. 717. Ap. 5, '13. 
 
 332 Flotation vs. Taljle concentration for copper ores. 
 Eng. & Min. Jour. v. !."., i>. :',28. F. 8, '13. 
 
 333 Gogo juice and golJ. 
 
 Eng. & Min. Jour. v. 96, p. 516. S. 13, '13. 
 
 334 Great Cobar, Ltd. 
 
 Min. Jour. v. 100, p. 30, Ja. 4, '13. 
 
 335 Hayden, Ralph. Concentration of slimes at Anaconda, Mont. 
 Bull. Am. Inst. Min. Engrs. Ag. '13. p. 1443-1467. Illus. 
 Discussion. Ibid. 1913. p. 2740-2741. 
 
 336 1; of strand, O. B. The Macquisten tube flotation process. 
 Min. & Eng. Wld. v. 38j p. 1191-1192. Je. 21, '13. Illus. 
 
 337 Hoover, Theodore J. Zinc production at Broken Hill. 
 Min. Mag. v. 8, p. 47-48. Ja. '13. 
 
 338 Huston, George. Some ifs, ands and buts of flotation. 
 Min. Sci. v. 68, p. 149-150. S. '13. 
 
 339 Jaffe, Richard. Untersuchungen uber die Moglichkeit eines 
 neuen Aufbereitungprinzips unter Verwendung von Schaumen. 
 
 Metall und Erz. v. 10 (N. F. I.), p.< 315-326. Mr. 8, '13; p. 349- 
 362. Mr. 22, '13. Illus. 
 
 340 .lames, J. C. and Farrier, Val. Joint report. 
 
 N. S. W. Mines Dept. 1912. p. 85-91; 1913. p. 91; 1914, p. 89. 
 
 341 .Vaequisten tube flotation process. 
 
 Metl. & Chem. Engng. v. 11, p. 163. Mr. '13. Illus. 
 
 :M2 The Macquisten tubes. 
 
 Knar. & Min. Jour. v. 95, p. 183-184. Ja. 18, '13. 
 
 343 Miller, B. L. The graphite industry of Pennsylvania. 
 Min. & Eng. Wld. v. 38, p. 625-628. Mr. 29, '13. Illus. 
 
 344 Mineral separation by froth. 
 Min. Jour. v. 101, p. 470. My. 10, 13. 
 
 345 Mineral separation. Use of eucalyptus oil. 
 Aust. Min. Stand, v. 49, p. 544. Je. 26, '13. 
 
MISSOURI SCHOOL OF MIN#S. 33 
 
 346 Minerals Separation notation in Colorado. 
 Metl. & Chem. Engng. v. 11, p. 605. N. '13. 
 
 347 Minerals Separation plants in Chile and Sweden. 
 Eng. & Min. Jour. v. 95, p. 271. F. 1, '13. 
 
 348 Minerals Separation process. 
 
 Min. Mag. v. 2, p. 463-464. Je. '10. Illus. v. 9, p. 171-172. S. '13. 
 
 349 Newman, J. Malcolm. Broken Hill treatment methods. Recent 
 developments. Selective flotation. 
 
 Aust. Min. Stand, v. 49, p. 534-535. Je. 26, '13. 
 
 350 - Metallurgy at Broken Hill. 
 
 Min. & Sci. Pr. v. 107, p. 307-308. Ag. 23, '13. Illus. 
 
 351 Notes on Broken Hill treatment methods. 
 Min. & Eng. Wld. v. 39, p. 331-332. Ag. ,23, '13. 
 
 352 Zinc and lead. Selective flotation. 
 Metl. &, Chem. Engng. v. 11, p. 592-593. O. 13. 
 
 353 Oil flotation. 
 
 Min. Mag. v. 6, p. 428. Je. '12; v. 8, p. 102-104. F. '13. 
 
 354 Operations of Murex Magnetic Co., Ltd. 
 Eng. & Min. Jour. v. 96, p. 128. Jl. 19, '13. 
 
 355 Ore concentration in America. 
 
 Aust. Min. Stand, v. 50, p. 362. O. 30, '13. 
 
 356 *Preparation de Minerals Mixtes par Voie Humide. 
 Echo des Mines. My. 7, '14, p. 1913. 
 
 Preparation of mixed ores in a wet way. 
 
 357 *Procedimiento patentado de flotacion de minerales metalicos 
 del ingeniero de Minas J. Menendez Ormaza. 
 
 Revista Minera, O. '13, p. 485. 
 
 Patented process of J. Menendez for flotation of metallic ores. 
 
 358 *Procedimientos de Preparacion Mecanica de Minerales por 
 Flotacion. 
 
 Revista Minera, N. 16, '13, p. 549. N. 24, p. 561. Illus. 
 Mechanical methods for preparation of ores by flotation. 
 
 359 Processes. 
 
 Min. Mag. v. 9, p. 342. N. '13. 
 
 360 Progress of Minerals Separation process. 
 Eng. & Min. Jour. v. 96, p. 108. Jl. 19, '13. 
 
 361 *Putz, O. Der gegenwartige Stand der Aufbereitung von Zink 
 und Bleierzen in Oberschlesien. 
 
 Zts. Oberschles Berg und Huttenmannisch. Vereins, Ja. '13, p. 1. 
 The present position of the preparation of zinc and lead ores in 
 Upper Silesia. 
 
34 MISSOURI SCHOOL OF MINES. 
 
 362 Requirements for successful ore-flotation. 
 Metl. & Chem. Engng. v. 11, p. 118-119. Mr. '13. 
 
 363 Selective flotation at Broken Hill. 
 
 Min. & Sci. Pr. v. 106, p. 915. Je. 14, '13; v. 107, p. 334. Ag. 30, '13. 
 
 364 Shellshear, Wilton. Mineral flotation. 
 Min. & Sci. Pr. v. 107, p. 622. O. 18, '13. 
 
 365 Spicer, H. N. Evolution of methods of handling slime. 
 Australian practice. 
 
 Metl. & Chem. Engng. v. 11, p. 315-319. Je. '13. Illus. 
 
 366 Sulman, H. Livingstone. Concentration by flotation. 
 Min. & Sci. Pr. v. 106, p. 554. Ap. 12, '13. 
 
 367 Tailings and ore treatment at Broken Hill. 
 Min. & Sci. Pr. v. 107, p. 104-105. Jl. 19, '13. Illus. 
 
 368 Walker, Edward. Concentration by flotation. 
 Min. & Sci. Pr. v. 106, p. 29-30. Ja. 4 ,'13. Illus. 
 
 369 Wood, Henry E. Concentration of telluride ores. 
 Eng. & Min. Jour. v. 95, p. 885-886. My, 3, '13. 
 
 370 The flotation of minerals. Describing the Wood flo- 
 tation process and three types of machines. 
 
 Eng. Mag. v. 44, p. 612-G14. Ja. '13. Illus. 
 
 371 Yeatman, Pope. Braden Copper Co. 
 Min. & Sci. Pr. v. 107, p. 19-20. Jl. 5, '13. 
 
 372 Zinc Corporation and flotation processes. Murex Magnetic Co.'s 
 affairs. 
 
 Min. & Sci. Pr. v. 107, p. 26. Jl. 5, '13. Illus. 
 
 1914 
 
 373 Bevan, John. Application of flotation to gold ores. 
 Min. & Sci. Pr. v. 109, p. 413-414. S. 12, '14. 
 
 374 Briggs, Henry. A medieval precursor of oil flotation. 
 Eng. & Min. Jour. v. 97, p. 553-554. Mr. 14, '14. 
 
 375 Bush, Paris V. Phelps-Dodge in the Burro Mountains. 
 Eng. & Min. Jour. v. 98, p. 375-377. Ag. 29, '14. Illus. 
 
 376 Channing, J. Parke. Flotation process of ore concentration. 
 Min. & Engng. Wld. v. 40, p. 333-334. F. 14, '14. 
 
 377 Chapman and Tucker flotation patents. 
 Eng. & Min. Jour. v. 98, p. 476. S. 12, '14. 
 
 378 Collins, George E. Concentration of complex sulphide ore from 
 the Mary Murphy Mine. 
 
 Metl. & Chem. Engng. v. 12, p. 243-246. Ap. '14. 
 
MISSOURI SCHOOL OF MINKS. 35 
 
 379 Cohn, Jesse E. Timber-Butte new concentrator. The process 
 is a combination of gravity and flotation concentration. Two 
 products, lead-iron concentrates and finished zinc concentrates. 
 
 Min. & Engng. Wld. v. 40, p. 1049-1052. Je. 6, '14. Illus. 
 
 380 Demonstrating the selective action of the flotation principle. 
 Min. Sci. v. 69, p. 50-51. Mr. '14. 
 
 381 Developments in concentration methods. 
 Metl. & Chem. Engng. v. 12, p. 5-6. Ja. '14. 
 
 382 Dry concentration and flotation at Joplin. 
 Metl. & Chem. Engng. v. 12, p. 492-493. Ag. '14. 
 
 383 Flotation an increasing factor in zinc production. 
 Min. Sci. v. 69, p. 39-41. F. '14. 
 
 384 Flotation and cyaniding. 
 
 Metl. & Chem. Engng. v. 12, p. 221-222. Ap. '14. 
 
 385 Flotation at Butte, Montana. 
 Min. Mag. v. 11, p. 66-67. Jl. '14. 
 
 386 The flotation concentration of ores. 
 Minr. Ind. v. 23, p. 855-866. 1914. 
 
 387 Flotation in southeast Missouri. 
 
 Eng. & Min. Jour. v. 98, p. 359. Ag. 22, '14. 
 
 388 Flotation of lead and copper ores. 
 Metl. & Chem. Engng. v. 12, p. 77. F. '14. 
 
 389 Flotation of the Elm Orlu ores. 
 
 Min. & Sci. Pr. v. 109, p. 545-546. O. 10, '14. 
 
 390 Flotation of zinc sulphides. 
 
 Eng. & Min. Jour. v. 79, p. 1208. Je. 13, '14. 
 
 391 The flotation process in Arizona. 
 
 Min. & Engng. Wld. v. 40, p. 510. Mr. 14, '14. 
 
 392 French, Herbert J. Flotation tests on, ores from Bisbee and 
 Cobalt. 
 
 Sch. Mines Quar. v. 36, p. 57-67. N. '14. 
 
 393 Frost, G. J. Acid-gas flotation. 
 Min. Mag. v. 10, p. 281. Ap. '14.1 
 
 394 Gayford, Ernest. Mill of National Copper Mining Co. 
 Eng. & Min. Jour. v. 97, p. 1275-1278. Je. 27, '14. Illus. 
 
 395 Greenway and Lowrey flotation patent. 
 Eng. & Min. Jour. v. 98, p. 173. Jl. 25, '14. 
 
 396 *Heym, Ingenieur. Der Schwemmprozess fur Mineralien. 
 Kali, Erz & Kohle, 1914. No. 18, p., 627. 
 
 The flotation process for minerals, 
 
36 MISSOURI SCHOOL OF MINKS. 
 
 397 Horwood, E. J. The preferential flotation of zinc sulphides 
 from mixed sulphides by the Horwood process. 
 
 *Proc. Aust. Inst. Min. Engrs. N. 12, '13, p. 333. 
 Min. Jour. v. 105, p. 415-41G. My. 2, '14. 
 
 398 Horwood flotation process. 
 
 Min. Mag. v. 10, p. 375-376. My. '14. 
 
 399 Hyde, James M. The Murex process in a German works. 
 Metall und Erz. v. 11 (N. F. II), p. 580-581. Ag. 22, '14. 
 
 Min. & Sci. Pr. v. 108, p. 931-933. Je. 6, '14. Illus. 
 
 400 Interest in oil flotation. 
 
 Eng. & Min. Jour. v. 98, p. 279. Ag. 8, '14. 
 
 401 Keedy, Dyke V. Concentration of complex sulphide ore from 
 the Mary Murphy Mine. 
 
 Metl. & Chem. Engng. v. 12, p. 157-161. Mr. '14. 
 
 402 Laist, Frederick and Wiggin, Albert F. The slime concentrat- 
 ing plant at Anaconda. 
 
 Bull. Am. Inst. Engrs. Ag. '14. p. 2201-2215. Illus. 
 
 403 *Liwehr, August E. Die flotationscheidung. 
 Oesterreichische Zeit. f. B. u. H. Ag. 29, '14. 
 
 404 Lyon Dorsey A. and Arentz, Samuel S. Losses of zinc in min- 
 ing, milling, and smelting. 
 
 Bull. Am. Inst. Min. Engrs. Jl. '14, p. 1419-1420. Illus. 
 
 405 Moore, Richard B. and Kithil, Karl L. A preliminary report 
 on uranium, radium and vanadium. 
 
 U. S. Bureau of Mines Bulletin No. 70, p. 35-41. 1914. Illus. 
 
 406 Motherwell, William. Flotation tests at Mt. Morgan. 
 Min. & Sci. Pr. v. 108, p. 1044-1046. Je. 27, '14. 
 
 407 The Murex process at Clausthal. 
 Min. Mag. v. 11, p. 66. Jl. '14. 
 
 408 Das Murex-Verfahren. 
 
 Metall und Erz. v. 11, (N. F. II), p. 207. Mr. 22, '14. 
 
 409 Oil flotation at Butte and Superior. 
 Metl. & Chem. Engng. v. 12, p. 222. Ap. '14. 
 
 410 Ore dressing by flotation process. 
 Mex. Min. Jour. v. 18, p. 364. D. '14. 
 
 411 Parmelee, H. C. Concentration of complex sulphide ore from 
 Mary Murphy Mine. 
 
 Metl. & Chem. Engng. v. 12, p. 21-26. Ja. '14. Illus. 
 
 412 Pine oils for flotation. 
 
 Eng. & Min. Jour. v. 98, p. 829-830. N. 7, '14. 
 
 413 Preferential flotation of zinc sulphide by the Horwood process. 
 Metl. & Chem. Engng. v. 12, p. 414-415. Je. '14, 
 
MISSOURI SCHOOL OF MINES. 37 
 
 414 Schranz, H. Ein experimenteller Beitrag zur Kenntnis der 
 Schwimmvermogen. 
 
 Metall und Erz. v. 11 (N. F. II), p. 462-470. Jl. 1, '14. Illus. 
 
 415 Schwarz, Alfred. Table concentration vs. flotation. 
 Eng. & Min. Jour, v. 98, p. 317. Ag. 15, '14. 
 
 416 Selective flotation. 
 
 Min. Mag. v. 10, p. 19-20. Ja. '14. 
 
 417 Selective flotation by Horwood's process. 
 Metl. & Chem. Engng. v. 12, p. 350. My. '14. 
 
 418 Slime treatment at Broken Hill. 
 Min. Jour, v, 91, p. 1279-1280. N. 5, '10. 
 
 Metall u. Erz, v. 11 (N. F. II), p. 351-352. My. 8, '14. 
 
 419 The southeastern Missouri mine managers become co-operative. 
 Eng. & Min. Jour. v. 98, p. 715. O. 17, '14. 
 
 420 Treatment of slimes. A big difficulty overcome. 
 Aust. Min. Stand, v. 51, p. 47. Ja. 15, '14. 
 
 421 Valentiner, S. Zur Theorie der Schwimmverfahren. 
 Metall und Erz. v. 11 (N. F. II), p. 455-462. Jl. 1. '14. Illus. 
 
 1915 
 
 422 About flotation. 
 
 Min. & Sci. Pr. v. Ill, p. 155-156. Jl. 31, '15. 
 
 423 Bains, Thomas M. The electrical theory of flotation II. 
 Min. & Sci. Pr. v. Ill, p. 883-894. D. 11, '15. 
 
 424 Belchic, George. Flotation of Joplin-galena slime. 
 Metl. & Chem. Engng. v. 13, p. 847. N. 15, '15. 
 
 425 Block, James A. Why is flotation? 
 
 Min. & Sci. Pr. v. Ill, p. 659-660. O. 20, '15. 
 
 426 Blyth, W. B. Flotation in gold metallurgy. 
 Metl. & Chem. Engng. v. 13, p. 309. My. '15. 
 *Aust. Inst. Min. Eng. Bull. 16. 
 
 427 Flotation: Its spheres of usefulness in gold metal- 
 lurgy. 
 
 Min. & Sci. Pr. v. 110, p. 523. Ap. 3, '15. 
 
 428 Bradford selective flotation. 
 
 Eng. & Min. Jour. v. 100, p. 562. O. 2, '15. 
 
 429 Brick from flotation tailings at Anaconda. 
 Eng. & Min. Jour. v. 99, p. 455. Mr. 6, '15. 
 
 430 Broken Hill milling practice. 
 
 Eng. & Min. Jour. v. 100, p. 151-153. Jl. 24, '15. 
 
 431 Butters, Chas. Flotation of gold ores. 
 . & Sci. Pr, v. Ill, p. 954. P. 25, '15. 
 
38 MISSOURI SCHOOI, OF MINES. 
 
 432 Butters, Chas. and Clennell, J. E. Cyanide treatment of flota- 
 tion concentrate. 
 
 Min. & Sci. Pr. v. Ill, p. 778-785. N. 20, '15. 
 
 433 Callow, J. M. Callow flotation process. 
 
 Eng. & Min. Jour. v. 100, p. 919-923. D. 4, '15. Illus. 
 
 434 Flotation of coprer ores. 
 
 Min. & Sci. Pr. v. 110, p. 826-828. My. 29, '15. Illus. 
 
 435 Notes on flotation. 
 
 Mex. Min. Jour. v. 20, p. 438-440. D. '15. 
 
 From a paper read before the New York meeting of the A. I. M. E. 
 F. '16. 
 
 436 Notes on flotation. Historical sketch. 
 
 Bull. Am. Inst. Min. Engrs. No. 108, p. 2321-2339. D. '15. Illus. 
 
 437 Callow pneumatic process of flotation. 
 
 Metl. & Chem. Engng. v. 13, p. 571-572. S. 1, '15. Illus. 
 
 438 Carpenter, Jay A. Slime agitation and solution replacement 
 methods at the West End Mill, Tonopah, Nevada. 
 
 Bull. Am. Inst. Min. Engrs. No. 104. Ag. '15, p. 1639-1651. Illus. 
 
 439 Collins, George E. Everson. 
 
 Min. & Sci. Pr. v. Ill, p. 881. D. 11, '15. 
 
 440 Concentration of copper ores by flotation. 
 Min. & Sci. Pr. v. Ill, p. 304-305. Ag. 28, '15. 
 
 441 The concentrator of the Baden Copper Co. 
 Mex. Min. Jour. v. 20, p. 429-430. D. '15. 
 
 Abstract of a description by The Mill Staff in Teniente Topics. 
 
 442 Copper and the flotation process. 
 Metl. & Chem. Engng. v. 13, p. 133. Mr. '15. 
 
 443 Coutts, J. Methods of testing oils for the Minerals Separation 
 process. 
 
 Aust. Min. Stand, v. 53, p. 255. Ap. 8, '15. 
 Metl. & Chem. Erigng. v. 13, p. 389-390. 
 
 444 Drucker, A. E. Flotation on gold ores. 
 Min. & Sci. Pr. v. Ill, p. 772. N. 20, '15. 
 
 445 Durell, Charles T. Liquid jets. A study of a phenomenon of 
 importance in flotation and cyanidation. 
 
 Metl. & Chem. Engng. v. 13, p. 714-716. O. 15, 15. 
 
 446 Why is flotation. 
 
 Min. & Sci. Pr. v. Ill, p. 428-431. S. 18, '15. 
 
 447 Easton, W. B. Tube-milling for the flotation or oil-concentration 
 process. 
 
 Metl. & Chem. Engng. v. 13, p. 89-90. F. '15. Illus. 
 
 448 Effects of soluble components of ore on flotation. 
 Min. & Sci. Pr. v. Ill, p. 931-932. D. 18, '15. 
 
MISSOURI SCHOOIv OF MINES. 39 
 
 449 Fleming, James A. Recent progress in flotation. 
 Eng. & Min. Jour. v. 100, p. 233-234. Ag. 7, '15. 
 
 450 Flotation. 
 
 Min. Mag. v. 10, p. 146-147. F. '14. 
 
 Min. & Sci. Pr. v. 106, p. 106-107. Ja. 11, '13; v. Ill, p 3. Jl. 3, '15. 
 
 451 Flotation and cyanidation. 
 
 Metl. & Chem. Engng. v. 13, p. 880-881. D. 1, '15. 
 
 452 Flotation as a conservation measure. 
 Metl. & Chem. Engng. v. 13, p. 344-345. Je. '15. 
 
 453 Flotation at Broken Hill. 
 
 Min. & Sci. Pr. v. Ill, p. 91. Jl. 17, '15; p. 343-344. S. 4, '15. 
 
 454 Flotation at Colorado School of Mines. 
 Min. Sci. v. 72, No. 1766, p. 4. D. 18, '15. 
 
 455 Flotation at Cripple Creek. 
 
 Eng. & Min. Jour. v. 100, p. 964-965. D. 11, '15. 
 
 456 Flotation at Globe-Miami, Ariz. 
 
 Eng. & Min. Jour. v. 100, p. 1001-1002. D. 18, '15. 
 
 457 Flotation at Gold Hunter. 
 
 Salt Lake Min. Rev. v. 17, p. 27. Ap. 15, '15. 
 
 458 Flotation at Gold Hunter Mill. 
 
 Eng. & Min. Jour. v. 100, p. 1044-1046. D. 25, '15. Illus. 
 
 459 Flotation at Inspiration. 
 Min. Mag. v. 8, p. 340. My. '13. 
 
 Metl. & Chem. Engng. v. 11, p. 309. Je. '13.~~ 
 Min. & Sci. Pr. v. Ill, p. 7-10. Jl. 3, '15. Illus. 
 
 460 Flotation at Mt. Morgan, Queensland. 
 Min. & Sci. Pr. v. Ill, p. 310. Ag. 28, '15. 
 
 461 Flotation at Silverton. 
 
 Salt Lake Min. Rev. v. 17, p. 20. Ag. 30, '15. 
 
 462 Flotation at the Consolidated Arizona Smelting Co., Humboldt, 
 Arizona. 
 
 Metl. & Chem. Engng. v. 13, p. 897-901. D. 1, '15. Illus. 
 
 463 Flotation at the Timber Butte Mill, Montana. 
 Metl. & Chem. Engng. v. 13, p. 447-449. Jl. '15. Illus. 
 
 464 Flotation for copper and silver ores. 
 Min. Jour. v. 110, p. 477. Jl. 3, '15. 
 
 465 Flotation in a Mexican Mill. 
 
 Min. & Sci. Pr. v. Ill, p. 122-126. Jl. 24, '15. 
 
 466 Flotation in North America. 
 Min. Mag. v. 12, p. 190-192. Ap. '15. 
 
 467 The flotation of copper ores. 
 
 Min. & Sci. Pr. v. 110, p. 680-682. My. 1, '15. 
 
40 MISSOURI SCHOOL 01? MINES. 
 
 468 Flotation oils. 
 
 Eng. & Min. Jour. v. 99, p. 462. Mr. 6, '15. 
 Min. Sci. v. 72, No. 1762, p. 16. N. 20, '15. 
 
 469 Flotation oil specialists. 
 
 Min. & Engng. Wld. v. 43, p. 378. S. 4, '15. 
 
 470 The flotation process. 
 
 Eng. Mag. v. 35, p. 865-867. S. '08. 
 
 Eng. & Min. Jour. v. 96, p. 1037. N. 29, '13; v. 99, p. 99-100. Ja. 
 9, '15. 
 
 471 French, H. J. Flotation tests on Bisbee and Cobalt ores. 
 Metl. & Chem. Engng. v. 13, p. 509. Ag. '15. 
 
 472 Flotation tests on Cobalt silver ores. 
 Can. Min. Jour. v. 36, p. 400-401. Jl. 1, '15. 
 
 473 Froth and flotation. An early recognition of the importance of 
 froth in the flotation process by three students at the University 
 of California. 
 
 Min. & Sci. Pr. v. Ill, p. 160-161. Jl. 31, '15. 
 
 474 Gahl, Rudolf. Flotation results. 
 
 Metl. & Chem. Engng. v. 13, p. 408. Jl. '15. 
 
 475 Galbraith, Charles S. Flotation in Australia. 
 Min. & Sci. Pr. v. Ill, p. 83-86. Jl. 17, '15. Illus. 
 
 476 Grades and kinds of oil for flotation processes. 
 Min. & Engng. Wld. v. 43, p. 481-482. S. 25, '15. Illus. 
 
 477 Hebbard, James. Evolution of Minerals Separation process on 
 Central Mine, Australia. 
 
 *Trans. Aus. Inst. Min. Eng. No. 10, 1913. Illus. 
 Abstract. Min. & Sci. Pr. v. Ill, p. 347-353. S. 4, '15. 
 
 478 The Horwood flotation process for zinc sulphides. 
 Min. & Engng. Wld. v. 42, p. 13-14. Ja. 2, '15. 
 
 479 Ingalls, H. W. The Hunter Mining Co.'s flotation plant. 
 Min. & Engng. Wld. v. 42, p. 460. Mr. 6, '15. 
 
 480 Laughlin, J. P. M. Progress in oil flotation. 
 Salt Lake Min. Rev. v. 16, p. 40-42. Ja. 15, '15. 
 
 481 A lost page in the history of oil flotation. 
 Min. Sci. v. 72, No. 1762, p. 3. N. 20, '15. 
 
 482 Low, V. F. Stanley. Flotation on dump ore. 
 Min. & Sci. Pr. v. Ill, p. 879-880. D. 11, '15. 
 
 483 McClave, James M. Oil flotation process in a nut shell. 
 Min. Sci. v. 72, No. 1759, p. 8. O. 30, '15. 
 
 484 Marvin, Henry A. Development of ore concentration. 
 Eng. Mag. v. 49, p. 218-230. My. '15. Illus. (p. 229-230.) 
 
MISSOURI SCHOOL OF MINES. 41 
 
 485 Mathewson, E. P. Flotation at Washoe Reduction Works, Ana- 
 conda. 
 
 Min. & Sci. Pr. v. Ill, p. 312-313. Ag. 28, '15. Illus. 
 
 486 Megraw, Herbert A. Metallurgy in the Coeur d'Alenes. 
 Eng. & Min. Jour. v. 100, p. 827-830. N. 20, '15. Illus. 
 
 487 The new copper metallurgy. 
 
 Eng. Mag. v., 48, p. 675-688. F. '15. Illus. (p. 677-679.) 
 
 488 The metallurgy of zinc. 
 
 Bull. Am. Inst. Min. Engrs. p. 2705-2714. 1915. 
 
 489 Molybdenum recovery by Elmore process. 
 Eng. & Min. Jour. v. 99. p. 907. My. 22, '15. 
 
 490 Mueller, William A. Use of coal tar in flotation. 
 Eng & Min. Jour. v. 100, p. 591-593. O. 9, '15. 
 
 491 A new flotation experiment. 
 
 Eng. & Min. Jour. v. 100, p. 900. N. 27, '15. 
 
 492 New flotation installations. 
 
 Eng. & Min. Jour. v. 100, p. 668. O. 23, '15. 
 
 493 Oils and flotation. 
 
 Min. & Sci. Pr. v. 110, p. 675-676. My. 1, '15. 
 
 494 Operations at Old Dominion. 
 
 Eng. & Min. Jour. v. 100, p. 1002. D. 18, '15. 
 
 495 Pine oil supply for flotation concentration. 
 Eng. & Min. Jour. v. 99, p. 619. Ap. 3, '15. 
 
 496 Preferential flotation. 
 
 Min. & Sci. Pr. v. Ill, p. 668. O. 30, '15. 
 
 497 Prosser, Warren C. Concentrating Gold King ores. 
 Eng. & Min. Jour. v. 100, p. 633-634. O. 16, '15. Illus. 
 
 498 Ralston, O. C. Preferential flotation. 
 Min. & Sci. Pr. v. 110, p.. 980-984. Je. 26, '15. 
 
 499 Why do minerals float? 
 
 Min. & Sci. Pr. v. Ill, p. 623-627. O. 23, '15. 
 
 500 Ralston, O. C. and Cameron, F. Recent progress in flotation. 
 Eng. & Min. Jour. v. 99, p. 937-940. My. 29, '15; v. 100, p. 68-69. 
 
 Jl. 10, '15. 
 
 501 Read, Thomas T. The Engels mine and mill. 
 Min. & Sci. Pr. v. Ill, p. 167-171. Jl. 31, '15. Illus. 
 
 502 Revett, Ben S. How my first introduction to flotation bubbles 
 cost me hard labor and more bubbles. 
 
 Min. & Sci. Pr. v. Ill, p. 590-591. O. 16, '15. 
 
 503 Rickard, T. A. Charles Butters and the new metallurgy. 
 Min. & Sci, Pr. v. Ill, p. 273-279. Ag. 21, '15. Illus. 
 
42 MISSOURI SCHOOL OF MINES. 
 
 504 What is flotation? 
 
 Min. & Sci. Pr. v. Ill, p. 383-386. S. 11, '15; p. 513-517. O. 2, '15. 
 Illus. 
 
 505 Salinger, Herbert. Flotation plant of the Utah Leasing Co. 
 Min. & Sci. Pr. v. Ill, p. 899. D. 11, '15. 
 
 Salt Lake Min. Rev. v. 17, p. 9-11. N. 15, '15. Illus. 
 
 506 Schwarz, A. Recent progress in flotation. 
 Eng. & Min. Jour. v. 99, p. 1084. Je. 19, '15. 
 
 507 Shellshear, W. Disposal of flotation residue. 
 Min. & Sci. Pr. v. Ill, p. 892-895. D. 11, '15. Illus. 
 
 508 Simons, Theodore. The concentrator of the Timber Butte Mill- 
 ing Co., Butte, Mont. 
 
 Bull. Am. Inst. Min. Engrs. S. '15; p. 1295-1316. Illus. 
 
 509 - Oil flotation at Timber Butte. 
 Salt Lake Min. Rev. v. 16, p. 17-18. F. 28, '15. 
 
 510 Smith, H. Hardy. Flotation of silver-lead mineral at a New 
 South Wales mine. 
 
 Eng. & Min. Jour. v. 100, p. 953-956. D. 11, '15. Illus. 
 
 511 Smith, Ralph W. Flotation testing machine. 
 Eng. & Min. Jour. v. 100, p. 395-396. S. 4, '15. Illus. 
 
 512 - Gravity vs. oil flotation concentration. 
 Min. Sci. v. 71, p. 53-57. Je. '15. Illus. 
 
 513 Testing Bisbee ores for flotation. 
 
 Min. & Engng. Wld. v. 43, p. 145. Jl. 24, '15. 
 
 514 Testing oils for flotation. 
 
 Eng. & Min. Jour. v. 99, p. 1079-1080. Je. 19, '15. 
 Metl. & Chem. Engng. v. 13, p. 389-390. Je. '15. 
 
 515 Timber Butte Mill, Montana. 
 
 Min. & Engng. Wld. v. 42, p. 29-30. Ja. 2, '15. Illus. 
 
 516 Two historical notes on flotation. 
 
 Metl. & Chem. Engng. v. 13, p. 471-472. Ag. 15. 
 Sci. Amer. Supp. v. 80, p. 182. S. 18, '15. 
 
 517 Williams, Henry D. and Kenyon, W. Houston. Air-froth flota- 
 tion. 
 
 Min. & Sci. Pr. v. Ill, p. 701-706. N. 6, '15. Illus. 
 
 518 The Wood flotation machine. 
 
 Eng. & Min. Jour. v. 99, p. 455. Mr. 6, '15. Illus. 
 
 1916 
 
 519 Callow, J. M. The cost of flotation. 
 Metl. & Chem. Engng. v. 14, p. 32. Ja. 1, '16. 
 
 520 Dorr machines in the flotation process. 
 
 . & Engng. Wld. v. 44, p. 70. Ja. 8, '16. 
 
MISSOURI SCHOOL OF MINES. 43 
 
 521 Flotation at Humboldt, Arizona. 
 Min. & Sci. Pr. v. 112, p. 41. Ja. 8, '16. 
 
 522 Flotation in 1915. 
 
 Metl. & Chem. Engng. v. 14, p. 2-3. Ja. 1, '16. 
 
 523 Huston, George. Why is notation? 
 Min. & Sci. Pr. v. 112, p. 6-7. Ja. 1, '16. 
 
 524 Megraw, Herbert A. Progress of notation in 1915. 
 Eng. & Min. Jour. v. 101, p. 97-99. Ja. 8, '16. 
 
 On p. 98 is a map showing companies using or experimenting with 
 notation in the United States. 
 
 525 New ideas about flotation. 
 
 Eng. & Min. Jour., v. 101, p. 22-23. Ja. 1, '16. Illus. 
 
 526 Ralston, O. C. and Allen, Glenn L. Testing ores for the flotation 
 process. 
 
 Min. & Sci. Pr. v. 112, p. 8-13. Ja. 1, '16. Illus.; p. 44-49. Ja. 
 8, '16. Illus. 
 
 527 Sherwood, C. F. Pine oil for flotation. 
 Eng. & Min. Jour. v. 101, p. 21-22. Ja. 1, '16. 
 
 528 Testing for flotation. 
 
 Min. & Sci. Pr. v. 112, p. 35-36. Ja. 8, '16. 
 
 529 Tupper, C. A. Flotation Its progress and its effect upon mill 
 design. 
 
 Min. & Engng. Wld. v. 44, p. 1-14. Ja. 1, '16. Illus. 
 
 530 Whitaker, W. A. and Belchic, George. A form for the classi- 
 fication of flotation data. 
 
 Metl. & Chem. Engng. v. 14, p. 33. Ja. 1, '16. Illus. 
 
44 MISSOURI SCHOOL OF MINES. 
 
 COLLOIDS AND SURFACE TENSION 
 
 Bibliography. 
 
 531 *Miiller, A. Bibliography of colloids. 
 Zeit. Anorg. Chem. v. 39, p. 121. 1904. 
 
 "A bibliography of colloids containing three hundred and fifty-six 
 references. There is an appendix in which the articles are grouped 
 according to their subject." (Jour. Phys. Chem.) 
 
 General Works. 
 
 532 *B6rnstein, Richard, and Roth, Walther A. 
 
 Landolt-Bornstein physikalisch-chemische tabellen. 
 4 ed. Berlin. 1915. 
 Tables and data. 
 
 533 Boys, C. V. Soap-bubbles: Their colors and the forces which 
 mould them. London. 1912. Illus. 
 
 534 *Findlay, Alex. Practical physical chemistry. 3 ed. London. 
 1915. Illus. 
 
 535 *Freundlich, Herbert. Kapillarchemie. Eine darstellung der 
 kolloide und vernandter gebiete. Leipzig. 1909. 
 
 The author has divided the work into two parts, the first is con- 
 cerned with the properties of surfaces in general and part two 
 is devoted to dispersed systems. Foams are treated in part two. 
 
 536 Getman, Frederick H. Laboratory exercises in physical chem- 
 istry. N. Y. 1904. 
 
 p. 40-44. Illus. 
 
 537 Gibbs, J. Willard. The scientific papers. 2 v. N. Y. 1906. 
 The equilibrium of heterogeneous substances, p. 54-353, especially 
 p. 219. Reprinted from * Transactions of the Connecticut Aca- 
 demy, v. 3, p. 108-248; 343-524. 1875-1877. 
 
 Abstract of the above paper p. 354-371. Reprinted from 
 American Journal of Science Ser. 3, v. 16, p. 441-458. 1878. 
 
 538 Thermodynamische studien unter mitwirkung des 
 verfassers aus dem Englischen ubersetzt von W. Ostwald. Leip- 
 zig. 1892. 
 
 539 Gray, Francis W. A manual of practical physical chemistry. 
 London. 1914. 
 
 p. 65-69. 
 
 540 *Janek, A. A text book of dispersoidology (Modern colloidal 
 chemistry). Petrograd. 1915. 
 
 Carefully systematized material on the subject of colloidal chem- 
 istry with references and methods. Valuable for experimental and 
 research work. In Russian. 
 
 541 Kohlrausch, Friedrich. Lehrbuch der practischen physik. llth 
 ed. Leipzig. 1910. 
 
MISSOURI SCHOOL, OF MINES. 45 
 
 542 Luther, R. und Drucker, K. Ostwald-Luther hand-und hiilfs- 
 buch zur aufiihrung physiko-chemischer messungen. 3 auflage. 
 Leipzig. 1910. 
 
 p. 233-241. 
 
 543 Marie, Ch. ed. Tables annuelles de constantes et donnees 
 numeriques de chimie, de physique et de technologie. v. 1-date. 
 1910-date. Paris. 1912-date. 
 
 Tables and data. 
 
 544 Miiller, Arthur. Allgemeine chemie der Kolloide. Handbuch 
 der angewandten physikalischen chemie. Band 8. 1907. 
 
 A valuable summary of much of the work on colloids giving a mass 
 of well arranged data under the following heads: Methods of pre- 
 paring inorganic colloids; organic colloids; properties of colloidal 
 solutions; colloidal gels; theories of colloids; systematic classifica- 
 tion of colloids. 
 
 545 Ostwald, Wilh. Lehrbuch der allgemeinen chemie. 2 auflage. 
 1 Land. 1903. 
 
 p. 514-543. 
 
 Chapter on surface tension. 
 
 546 Partington, James Riddick. A text-book of thermodynamics 
 (with special reference to chemistry). N. Y. 1913. 
 
 p. 429-449. Illus. 
 
 547 Pockels, F. Kapillaritat. (In Winklemann, A. Handbuch der 
 physik. 2 auflage. 1 Band. 2 Halfte. p. 1119-1234. 1908.) 
 
 548 Rohland, Paul. The colloidal and crystalloidal state of matter. 
 London. 1911. 
 
 549 Spencer, James Frederick. An experimental course of physical 
 chemistry. London. 1911. 
 
 p. 139-148. Illus. 
 
 550 Stieglitz, Julius. The elements of qualitative chemical analysis. 
 N. Y. 1911. 
 
 p. 125-138. 
 
 A very clear explanation of the colloidal condition, easily under- 
 stood by students. 
 
 551 Svedberg, Dr. Theodor. Die Methoden zur Herstellung Kolloider 
 Losungen Anorganischer Stoffe. Dresden. 1909. 
 
 552 Taylor, W. W. Chemistry of colloids and some technical ap- 
 plications. N. Y. 1915. 
 
 553 Van Bemmelen, J. M. Die Absorption Gesammelte Abhand- 
 lungen uber Kolloide und Absorption, mit unterstutzung des 
 verfassers neu herausgegeben von Wo. Ostwald. Dresden. 1910. 
 
 The collected works of Van Bemmelen on colloids and absorption. 
 
 554 Watson, W. Textbook of physics. 8th imp. 4 ed. London. 
 1907. 
 
 p. 180-184. 
 
46 MISSOURI SCHOOL OF MINKS. 
 
 555 Willows, R. S. and Hatschek, E. Surface tension and surface 
 energy and their influence on chemical phenomena. Philadelphia. 
 1915. 
 
 Treats existence and theory of surface tension; relations between 
 surface tension and other physical constants; relations between 
 surface tension and chemical constants; factors affecting distribu- 
 tion of a solute in solution; effect of electric charge on surface 
 tension. 
 
 556 Winkleman, A. Absorption und adsorption. (In his Handbuch 
 der physik. 2 auflage. 1 Band. 2 Halfte. p. 1507-1542. 1908.) 
 
 557 Zsigmondy, Richard. Colloids and the ultramicroscope. A 
 manual of colloid chemistry and ultramicroscopy. Authorized 
 translation by Jerome Alexander. N. Y. 1909. 
 
 A general outline of colloid chemistry with a detailed account of 
 the characteristics of special colloids including colloidal sulphides, 
 oxides, metals, and non-metals. 
 
 Articles in Periodicals. 
 
 558 Allen, A. W. Colloids in ore dressing. 
 Min. & Sci. Pr. v. 107, p. 109-110. Jl. 19, '13. 
 
 559 Ashley, Harrison Everett. The colloid matter of clay and its 
 measurement. 1909. 
 
 U. S. Geological Survey, Bulletin 388. 
 
 560 Technical control of the colloidal matter of clays. 
 N. '11. 
 
 U. S. Bureau of Standards, Technical Papers No. 23. 
 
 561 Bancroft, Wilder D. The coagulation of albumin by electro- 
 lytes. 
 
 Jour. Phys. Chem. v. 19, p. 349-359. My. '15. 
 Trans. Am. Electroch. Soc. v. 27, p. 195-207. 1915. 
 
 562 Neutralization of adsorbed irons. 
 Jour. Phys. Chem. v. 19, p. 3G3-376. My. '15. 
 Trans. Am. Electroch. Soc. v. 27, p. 175-194. 1915. 
 
 563 The theory of colloid chemistry. 
 Jour. Phys. Chem. v. 18, p. 549-558. O. '14. 
 
 564 The theory of emulsification. 
 
 Jour. Phys. Chem. v. 16, p. 177-233. Mr. '12. Illus.; p. 345-372. 
 My. '12; p. 475-512. Je. '12. Illus.; p. 739-758. D. '12; v. 17, 
 p. 501-519. Je. '13; v. 19, p. 275-309. Ap. '15; p. 513-529. Je. '15. 
 
 These papers develop and expound the best general working theory 
 of colloids, froths, emulsions and adsorption that can be found. 
 With rare critical acumen, the complete literature on these sub- 
 jects is passed in review, sorted, sifted, amended, and recom- 
 bined into an eclectic system which, while years in advance of 
 
MISSOURI SCHOOL OF MINES. 47 
 
 contemporaneous treatises, is reduced to such simple, common- 
 sense terms as to be within range of any serious minded student. 
 
 The style is unhappily difficult, so that the following suggestions 
 may not be amiss. After several readings of the short paper on 
 "The Theory of Colloid Chemistry," read first the excellent sum- 
 maries at the ends of the "Theory of Emulsification" papers be- 
 fore undertaking a rapid survey of the whole set; follow this by 
 a more careful consideration of the summaries with re-reading 
 of portions of the text when necessary; continue this process 
 until the drift of the argument begins to reveal itself. 
 
 Other papers from the same author's laboratory on jellies, emul- 
 sions, and the theory of dyeing will be found to be not unrelated, 
 although seemingly more remote to a possible future theory of 
 flotation. 
 
 An eighth article on "Emulsification" appears in the Jour. Phys. 
 Chem. v. 20, p. 1, Ja. '16, and of this 'series there will be at least 
 one more preliminary paper on froths followed by an article 
 on the flotation of ores. V. H. G. 
 
 565 Bartlett, J. C. The action of small spheres of solids in as- 
 cending currents of fluids, and in fluids at rest. 
 
 Trans. Am. Inst. Min. Engrs. v. 6, p. 415-427. My. '77. 
 
 566 Benson, Clara C. The composition of the surface layers of 
 aqueous amyl alcohol. 
 
 Jour. Phys. Chem. v. 7, p. 532-536. O. '03. Illus. 
 
 567 Billitzer, Jean. Eine Theorie der Kolloide und Suspensionen. 
 Zeit. Phys. Chem. 45 Band, p. 307-330. O. 13, '03. 
 
 568 Theorie der Kolloide. II. 
 
 Zeit. Phys. Chem. 51 Band, p. 129-166. F. 28, '05. 
 
 569 Boys, C. V. Experiments with soap bubbles. 
 Smithsonian Inst. Annual Kept. 1912. p. 211-218. 
 
 570 Bradbury, Robert H. Colloids and crystals, the two worlds of 
 matter. 
 
 Jour. Fr. Inst. v. 176, p. 319-328. S. '13. 
 
 571 Briggs, T. R. Experiments on emulsions: Adsorption of soap 
 in the benzine-water interface. 
 
 Jour. Phys. Chem. v. 19, p. 210-231. Mr. '15. Illus. 
 
 572 Briggs, T. Roland and Schmidt, Hugo F. Experiments on 
 emulsions. II. Emulsions of water and benzene. 
 
 Jour. Phys. Chem. v, 19, p. 478-499. Je. '15. Illus. 
 
 573 Caetani, Gelasio. Sand, slime, and colloids in ore dressing. 
 Min. & Sci. Pr. v. 106, p. 438-442. Mr. 22, '13. 
 
 574 Cameron, Frank K. Soil colloids and the soil solution. 
 Jour. Phys. Chem. v. 19, p. 1-13. Ja. '15. 
 
 575 Colloids and their importance. x 
 Min. & Sci. Pr. v. 107, p. 87. Jl. 19, 13. 
 
48 MISSOURI SCHOOL OF MINES. 
 
 576 Corliss, Harry P. The distribution of colloidal arsenious sul- 
 phide between the two liquid phases in the system water, ether, 
 alcohol. 
 
 Jour. Phys. Cheni. v. 18, p. 681-G94. X. '14. Illus. 
 
 577 Devaux, H. E. Oil films on water and on mercury. 
 Smithsonian Institution. Annual Kept. 1913. p. 261-273. Illus. 
 
 578 Donnan, F. G. and Barker, J. T. Experimental investigation 
 of Gibbs's thermodynamical theory of interfacial concentration in 
 the case of an air-water interface. 
 
 Roy. Soc. Proc. Ser. A. v. 85, p. 557-573. N. 30, '11. 
 
 579 Garrison, Fielding, H. Josiah Willard Gibbs and his relation to 
 modern science. 
 
 Pop. Sci. M. v. 74, p. 470-484. My. '09; p. 551-561. Je. '09; v. 75, 
 
 p. 41-48. Jl. '09; p. 191-203. Ag. '09. 
 One of the best statements of Gibbs's theory to be found. 
 
 580 Carver, M. M. A new method of determining the range of 
 molecular action and the thickness of liquid films. 
 
 Jour. Phys. Chem. v. 16, p. 234-246. Mr. '12. 
 
 581 On the molecular constitution of the free surfaces 
 of liquids. 
 
 Jour. Phys. Chem. v. 17, p. 388-389. My. '13. 
 
 582 *Gibson, A. H. The behavior of bodies floating in a free or 
 a forced vortex. 
 
 Manchester Lit. & Philos. Soc. Memoir No. 7, 1911. 19 p. 
 
 583 * The manner of motion of water flowing in a curved 
 
 path. 
 
 Manchester Lit. & Philos. Soc. Memoir No. 13, 1911. 
 
 584 Harris, J. E. Some adsorption phenomena in soils and kaolin. 
 Jour. Phys. Chem. v. 18, p. 355-372. Ap. '14. 
 
 585 Haultain, H. E. T. Some early notes on surface tension action 
 in wet concentration. 
 
 Trans. Can. Min. Inst. v. 16, p. 115-136. 1913. 
 
 586 *Jamison, R. On the film or skin of warmed milk and other 
 proteid solutions. 
 
 Journal of Physiology, v. 27, p. 26. 1901-1902. 
 
 587 Kenrick, Frank B. Some lecture experiments on surface tension. 
 Jour. Phys. Chem. v. 16, p. 513-518. Je. 6, '12. Illus. 
 
 588 Lewis, W. C. M. An experimental examination of Gibbs's theory 
 of surface-concentration, regarded as the basis of adsorption, 
 with an application to the theory of dyeing. 
 
 Phil., Mag. v. 15, 6 Ser. p. 499-526. Ap. '08; v. 17, 6 Ser. p. 466-494. 
 
 Ap. '09. Illus. 
 
 From the Muspratt Laboratory of Physical and Electro-chemistry, 
 University of Liverpool. 
 
MISSOURI SCHOOL OF MINES. 49 
 
 589 Miller, W. Lash and McPherson, R. H. The behavior of col- 
 loidal suspensions with immiscible solvents. 
 
 Jour. Phys. Chem. v. 12, p. 706-716. D. '08. Illus. 
 
 590 Minkowski, H. Kapillaritat. 
 
 Encyklopadie der Mathematischen Wissenschaften. Band 5. Heft 
 4, p. 558-613. 1907. Illus. 
 
 591 Mukhopadhyaya, Jnanendranath. Coagulation of arsenious sul- 
 fide sol by electrolytes. 
 
 Jour. Amer. Chem. Soc. v. 37, p. 2024-2031. S. '15. 
 
 592 Newman, F. R. Experiments on emulsions. 
 Jour. Phys. Chem. v. 18, p. 34-54. Ja. '14. 
 
 593 Nicolai, G. Zur Klarung von Erzaufbereitungsabwassern. 
 Beitrage zur Entwicklung der mechanischen und neuere Erfahrungen 
 auf dem Gebiete der mechanisch-chemischen Aberwasserklarung 
 unter besonderer Beriicksichtigung von Bleierzaufbreitung. 
 
 Metall und Erz. v. 12 (N. F. Ill), p. 135-140; 155-162. 1915. Illus. 
 
 594 Noyes, Arthur A. The preparation and properties of colloidal 
 mixtures. 
 
 Jour. Amer. Chem. Soc. v. 27, p. 85-104.; F. '05. 
 A general discussion for students. 
 
 595 The preparation and properties of colloidal mixtures. 
 
 Pop. Sci. M. v. 67, p. 268-279. Jl. '05. 
 
 596 Oil films on water. 
 
 Min. & Sci. Pr. v. Ill, p. 156. Jl. 31, '15. 
 
 597 Pape, W. A. C. Why do many solids float on their liquids? 
 Metl. & Chem. Engng. v. 10, p. 392. Jl. '12. 
 
 598 Pockels, Agnes. Uefcer das spontane Sinken der Oberflachen- 
 spannung von Wasser, wasseringen Losungen und Emulsionen. 
 
 Annalen der Physik. IV. 8 Band. p. 854-871. Jl. 02. 
 
 599 Quincke, G. Die Bedeutung der Oberflachenspannung fur die 
 Photographic mit Bromsilbergelatine und eine neue Wirkung des 
 Lichtes. 
 
 Annalen der Physik. IV. Folge. 11 Band. p. 1100-1120. Jl. '03. 
 
 600 Die Messungen des Hrn. Gallenkamp mit Adhasion- 
 splatten. 
 
 Annalen der Physik. IV. Folge. 10 Band. p. 453-456. Ja. '03. 
 
 601 Niederschlagmembranen und Zellen in Gallerten 
 oder Losungen von Leim, Eiweisz und Starke. 
 
 Annalen der Physik. IV. Folge. 11 Band. p. 449-488. Je. '03 
 
 602 - Die Oberflachenspannung an der Grenze von Alkohol 
 mit wasserigen Salzlosungen. Bildung von Zellen, Spharokrys- 
 tallen und Krystallen. 
 
 Annalen der Physik. IV. Folge. 9 Band. p. 1-43. Ag. '02. 
 
50 MISSOURI SCHOOL OF MINES. 
 
 603 Die Oberflachenspannung an der Grenze wasseriger 
 Kolloidlosungen von verschiedener Koncentration. 
 
 Annalen der Physik. IV. Polge. 9 Band. p. 793-836. N. '02; p. 
 969-1045. D. '02. Illus.; 10 Band. p. 478-521. F. '03; p. 673-703. 
 Mr. '03. 
 
 604 Oberflachenspannuug und Zellenbildung bei Leim- 
 tannatlosungen. 
 
 Annalen der Pbysik. IV. Folge. 11 Band. p. 54-95. Ap. '03. 
 
 605 Die schaumstrukture des schwefels und deren ein- 
 flusz auf doppelbrechung, dichroismus, elektrische eigenschaften 
 und kristallbilclimg. 
 
 Annalen der Physik. IV. Folge. 26 Band. p. 625-711. Jl. 28, '08. 
 
 606 Ueber kolloidale Losungen. 
 
 Annalen der Physik. IV. Folge. 12 Band. p. 1165-1168. N. '03. 
 
 607 Ueber die Klarung truber losungen. 
 
 Annalen der Physik. IV. Folge. 7 Band. p. 57-96. D. '01. 
 
 608 Ueber unsichtbare Fliissigkeitsschichten und die 
 Oberflacnenspannung fliissiger Niederschlage bei Niederschlag- 
 membranen, Zellen, Colloiden und Gallerten. 
 
 Annalen der Physik. IV. Folge. 7 Band. p. 631-682. Mr. '02; 
 p. 701-744. Ap. '02. 
 
 609 ^Ranisden, W. Die coagulirung von eiweisskorpern auf mech- 
 anis^hem wege. 
 
 Archiv fiir Anatomic u. Physiologic. Physiologische abtheilung. 
 1894. p. 517-534. 
 
 610 Separation of solids in the surface-layers of solutions 
 and "suspensions." Observations on surface-membranes, bubbles, 
 
 * emulsions, and mechanical coagulation. (Preliminary account). 
 
 Chem. News. v. 88, p. 49-51. Jl. 31, '03. 
 
 611 Rayleigh, Lord. Investigations in capillarity. The size of drops. 
 The liberation of gas from supersaturated solutions. Colloiding 
 jecs. The tension of contaminated water-surfaces. 
 
 Phil. Mag. v. 48, p. 321-337. O. '99. 
 
 612 On the superficial viscosity of water. 
 Roy. Soc. Proc. v. 48, p. 127-140. Je. '90. Illus. 
 
 613 Richardson, Clifford. A unique geophysical phenomenon, trini- 
 idad asphalt, interesting from the point of view of dispersoid 
 chemistry. 
 
 Jour. Phys. Chem. v. 19, p. 241-249. Mr. '15. 
 
 614 Sulman, H. L. New discoveries in the physics of ore flotation. 
 (In Presidential address.) 
 
 Instn. Min. & Metl. Bulletin No. 79, p. 9-17. Ap. 19, '11. 
 
 615 Suspension colloids. 
 
 Min. & Sci. Pr. v. 106, p. 209. F. 1, '13- 
 
MISSOURI SCHOOIv OF MINES. 51 
 
 616 Swinburne, J., and Rudorf, G. The physics of ore flotation. 
 Eng. & Min. Jour. v. 81, p. 276-277. F. 10, '06. 
 
 Min. & Sci. Pr. v. 92, p. 126-127. F. 24, '06. 
 
 Abstract of a paper read before the Faraday Society, D. 12, '05. 
 
 617 Washburne, C. W. The capillary concentration of gas and oil. 
 Bull. Am. Inst. Min. Engrs., 1914. p. 2365-2378. 
 
 Discussion" appears in Bull. Am. Inst. Min. Engrs. 1915. p. 831-846. 
 
 LITIGATION 
 
 618 Argument in flotation processes and composition of the court. 
 English interests in Ontario, and new companies. 
 
 Min. & Sci. Pr. v. 108, p. 389. F. 28, '14. 
 
 619 *British Ore Concentration Syndicate Ltd. vs. Minerals Separa- 
 tion Ltd. 
 
 Aust. Min. Stand v. 42, p. 687. 1909. 
 
 620 Croasdale, Stuart. Why is the patent mania? 
 Eng. & Min. Jour. v. 99, p. 744-745. Ap. 24, '15. 
 
 621 Decision in Elmore flotation patents. 
 Eng. & Min. Jour. v. 88, p. 1118. D. 4, '09. 
 
 622 Decisions in flotation litigation. 
 
 Min. & Sci. Pr. v. 108, p. 759-761. My. 9, '14. 
 
 ^ 
 
 623 Decision in the flotation litigation. * . - 
 Eng. & Min. Jour. v. 96, p. 229. Ag. 2, '13. 
 
 624 The Elmore flotation process. The specifications showing the 
 original claims for the patents on which the process is based. 
 
 Mines & Min. v. 32, p. 124-125, S. '11. 
 
 625 Elmore oil process patent decision. 
 Eng. & Min. Jour. v. 86, p. 321. Ag. 15, '08. 
 
 626 Flotation. 
 
 Min. Mag. v. 9, p. 426-427. D. '13. 
 
 627 Flotation again. 
 
 Min. Mag. v. 13, p. 69-70. Ag. '15. 
 
 628 Flotation and the patent law. 
 
 Min. & Sci., Pr. v. 109, p. 586. O. 17, '14. 
 
 629 Flotation companies unite. Broken Hill concentration. 
 Min. & Sci. Pr. v. 104, p. 637. My. 4, '12. 
 
 630 Flotation litigation. 
 
 Min. Mag. v. 10, p. 168-170. Mr. '14; p. 406-407. Je. 14. 
 Eng. & Min. Jour. v. 97, p. 579. Mr. 14, '14; p. 673. Mr. 28, '14; p. 
 973-974. My. 9, '14. 
 
 631 Flotation litigation and possible results. 
 Min. & Sci. Pr. v. 107, p. 903. D. 6, '13. 
 
52 MISSOURI SCHOOIv OF MINKS. 
 
 632 Flotation litigation, Elmore vs. The Sulphide Corporation de- 
 cision. 
 
 Min. & Sci. Pr. v. 108, p. 343-344. Mr. 28, '15. 
 
 633 The notation patent litigation. 
 
 Eng. & Min. Jour. v. 97, p. 679. Mr. 28, '14. 
 
 634 Flotation patents. 
 
 Min. Mag. v. 1, p. 261-268; p. 289-290. D. '09. v. 2, p. 301. Ap. '10, 
 Eng. & Min. Jour. v. 97, p. 1067-1068. My. 23, '14. 
 
 635 The notation process. 
 
 Eng. & Min. Jour. v. 91, p. 745-74G. Ap. 15, '11, v. 97, p. 969. My. 9, 
 '14; v. 99, p. 253. Ja. 30, '15. 
 
 636 Flotation process litigation. 
 
 Min. Jour. v. 101, p. 418. My. 10, '13; v. 103, p. 1079. N. 15, '13; v. 
 
 105, p. 445. My. 9, '14. 
 Eng. & Min. Jour. v. 83, p. 865. My. 4, '07; v. 86, p. 778. O. 17, 
 
 '08; v. 87, p. 216. Ja. 23, '09; v. 96, p. 277. Ag. 9, '13; v. 98, p. 
 
 710, 0. 17, '14. 
 
 637 Flotation, process litigation. Ore Concentration Co. Ltd. v. 
 Sulphide Corporation. Full text of judgment. 
 
 Aust. Min. Stand, v. 46, p. 108. Ag. 3, '11. 
 
 638 Flotation processes. 
 
 Minr. Ind. v. 22, p. 838-843. 1913. 
 
 639 Flotation suit. 
 
 Metl. & Chem. Engng. v. 13, p. 409-411. Jl. '15. 
 
 640 Hyde, James M. Flotation and the patent law. 
 Min. & Sci. Pr. v. 109, p. 728. N. 7, '14. 
 
 641 Litigation. 
 
 Min. & Sci. Pr. v. 99, p. 766. D. 4, '09. 
 
 642 Minerals Separation Ltd. 
 
 Aust. Min. Stand, v. 51, p. 125. F. 12, '14. 
 
 643 Minerals Separation Co. sues. 
 
 Eng. & Min. Jour. v. 92, p. 1172. D. 16, '11. 
 
 644 The Minerals Separation decision. 
 Can. Min. Jour. v. 35, p. 340. My. 15, '14. 
 
 645 Minerals Separation suit at Butte, Mont. 
 Metl. & Chem. Engng. v. 11, p. 309. Je. '13. 
 
 646 Minerals Separation vs. Elmore. 
 Eng. & Min. Jour. v. 87, p. 38, Ja. 2, '09. 
 
 647 Minerals Separation, Ltd. vs. James M. Hyde. 
 Min. & Sci. Pr. v. 107, p. 270-272. Ag. 16, '13. 
 
 Min. Jour. v. 102, p. 738. Ag. 2, '13; p. 800. Ag. 23, '13. 
 
 Min. Mag. v. 10, p. 188-189. Mr. '14. 
 
 Eng. & Min. Jour. v. 96, p. 317-318. Ag. 16, '13. 
 
MISSOURI SCHOOL OF MINKS. 53 
 
 648 *Minerals Separation Ltd. vs. Potter. 
 Aust. Min. Stand, v. 42, p. 38. 1909. 
 
 649 Minerals Separation vs. Ore Concentration (1905). 
 Min. Jour. v. 85, p. 649. My. 22, '09. 
 
 650 More flotation litigation. 
 
 Eng. & Min. Jour. v. 98, p. 222. Ag. 1, '14. 
 
 651 More flotation-process litigation. 
 
 Eng. & Min. Jour. v. 83, p. 675. Ap. 6, '07. 
 
 652 More "Process" litigation. Ore Concentration Co. (1905) Ltd. 
 vs. Sulphide Corporation Ltd. 
 
 Aust. Min. Stand, v. 45, p. 539-540. Je. 1, '11. 
 
 653 Norris, Dudley H. Flotation A paradox. 
 Min. & Sci. Pr. v. Ill, p. 955-958. D. 25, '15. 
 
 654 Oil flotation. 
 
 Min. Jour. v. 106, p. 624-625. Jl. 4, '14. 
 
 655 Oil process litigation. 
 
 Min. & Sci. Pr. v. 97, p. G60-661. N. 14, '08. 
 
 656 The Ore Concentration Co. (1905). 
 Eng. & Min. Jour. v. 88, p. 130. Jl. 17, '09. 
 
 657 Ore Concentration Co. (1905) Ltd. The Elmore patents litiga- 
 tion. 
 
 Aust. Min. Stand, v. 47, p. 78. Ja. 25, '12. 
 
 658 Patent rights in oil separation processes. .The Minerals Separa- 
 tion, Ltd. (Appellants) vs. The British Ore Concentration Syndi- 
 cate and A. S. Elmore (Respondents). 
 
 Min. Jour. v. 87, p. 314-316. N. 20, '09. 
 
 659 Patent rights in oil separation processes. The British Ore Con- 
 centration Syndicate, Ltd. vs. Minerals Separation Ltd. 
 
 Min. Jour. v. 84, p. 220. Ag. 15, '08. 
 
 660 Potter and Delprat processes. 
 
 Eng. & Min. Jour. v. 83, p. 389. F. 23, '07. 
 
 661 *Potter Sulphide Ore Treatment Co. vs. Minerals Separation 
 Ltd. 
 
 Aust. Min. Stand, v. 41, p. 678. 1909. 
 
 662 Potter's sulphide treatment. 
 
 Min. & Sci. Pr. v. 96, p. 42. Ja. 4, '08. 
 
 663 Process litigation. 
 
 Min. Jour. v. 100, p. 136. F. 8, '13; p. 962. O. 11, '13. 
 
 G64 Process litigation. Minerals Separation case. 
 
 Aust. Min. Stand, v. 51, p. 208. Mr. 12, '14. 
 
 665 Progress of flotation litigation. 
 
 Min. & Sci. Pr. v. 108, p. 642-643. Ap. 18, '14. 
 
54 MISSOURI SCHOOL OF MINES. 
 
 666 Rival flotation processes. 
 
 Min. & Sci. Pr. v. 97, p. 344. S. 12, '08. 
 
 667 Scott, Walter A. Air-froth flotation. A legal version of the 
 technology of the process. 
 
 Min. & Sci. Pr. v. Ill, p. 583-589. O. 16, 15. Illus. 
 
 668 Shellshear, Wilton. Minerals Separation vs. Debavay process. 
 Min. & Sci. Pr. v. 107, p. 21. Jl. 5, '13. 
 
 669 The slime-filtering decision. 
 
 Eng. & Min. Jour. v. 94, p. 917-918. N. 16, '12. 
 
 670 The status of flotation litigation. 
 
 Min. & Sci. Pr. v. Ill, p. 917-918. D. 18, '15. 
 
 671 Sweeping decision in flotation litigation. 
 Metl. & Chem. Engng. v. 12, p. 362-363. Je. '14. 
 
 672 Walker, Edward. Flotation process litigation. 
 Min. & Sci. Pr. v. 98, p. G2. Ja. 9, '09. 
 
 673 Flotation processes during 1913. 
 Min. & Sci. Pr. v. 108, p. 79-80. Ja. 3, '14. 
 
 674 Wolf, J. D. Flotation patents. 
 
 Min. & Sci. Pr. v. 105, p. 832. D. 28, '12. 
 
 675 Zinc Corporation. Battle of the processes. The Elmore oil 
 process. 
 
 Min. & Sci. Pr. v. 94, p. 651-652. My. 25, '07. 
 
 676 Zinc Corporation and the flotation processes. 
 Eng. & Min. Jour. v. 91, p. 1198. Je. 17, '11. 
 
 677 Zinc process litigation. 
 
 Min. Jour. v. 95, p. 1256. D. 23, '11. 
 
MISSOURI SCHOOL OF MIN^S. 55 
 
 PATENTS 
 
 In the comparatively short space of twelve years (June, 1912) 
 about 500 patents for flotation processes, or apparatus in connection 
 with them, have been applied for. All of them without exception 
 are based upon the difference in the relations between ores and 
 gangues to the surface tension of water. From the theoretical point 
 of view, the only distinction between the various processes consists 
 in the means adapted to raise the ore particles to the surface, but 
 in the particular working of the various apparatus and plans there 
 are some substantial differences. The important British and United 
 States patents are chronologically arranged below. 
 
 GREAT BRITAIN. 
 
 678 G. Robson, Dolgelley, and S. Crowder, London, Eng. Separat- 
 
 ing ores from finely divided gangue by adding soapy water and a 
 hydrocarbon. No. 2,538 of 1895. 
 
 670 Ore Treatment. F. E. Elmore, Leeds. Using a heavy oil for 
 
 catching the metallic constituents of ore, while the gangue is 
 washed away by the water. No. 21,948 of 1898. 
 
 680 Concentrator. A. S. Elmore, London. Modifications in the 
 plans used in the inventor's system of concentrating ores with oil. 
 No. 15,526 of 1901. 
 
 681 Sulphide Ore Treatment. C. V. Potter, Victoria, Australia. 
 Treating fine ground sulphide ores with a weak solution of sulphuric 
 acid and heat, so causing metallic compounds to float on the sur- 
 face and separate from the gangue. No. 1,146 of 1902. 
 
 682 Concentrator. H. E. T. Haultain and H. R. Stovel, Nelson, B. 
 C. A plant for concentrating ores by the addition of oil to the pulp. 
 No. 9,521 of 1902. 
 
 683 Concentration by Oil. A. Froment, Traversella, Italy. In sep- 
 aration of ores by oil concentration, the addition of substances to 
 generate gas which makes the separation more rapid. No. 12,778 
 of 1902. 
 
 684 Oil Concentration. J. B. Schammell, London. Using oil, con- 
 taining a small quantity of chloride of sulphur, for catching metallic 
 particles out of ore. No. 15,280 of 1902. 
 
 685 Treating Sulphide Ores. G. D. Delprat, Broken Hill, N. S. W. 
 Separating sulphides from gangue by immersing the finely ground 
 ore in a hot solution of bisulphate of soda, the sulphides thereon 
 rising to the surface and the gangue falling to the bottom. No. 
 26,279 of 1902. 
 
 686 Treating Zinc-Bearing Tailings G. D. Delprat, Broken Hill, N. 
 
 S. W. Throwing zinc tailings into an acid solution of nitrate of 
 soda, the sulphides being carried to the top by the gas generated 
 and the gangue falling to the bottom. No. 26,280 of! 1902. 
 
56 MISSOURI SCHOOL OF MINES. 
 
 687 Separating Ores. A. E. Cattermole, London. Separating ores 
 from gangue by first immersing in an emulsion of oil, soap and 
 water, the proportion of oil being very small, so that the metallic 
 particles do not float but sink with the gangue, and afterwards sep- 
 arating the metallic particles by mechanical classifiers. No. 26,295; 
 26,296 of 1902. 
 
 688 Oil Concentration. A. S. Elmore, London. In the oil concen- 
 tration process, arrangements for working without access of air so 
 as to adapt the process to the treatment of tellurides and other 
 easily oxidizing ores. No. 184 of 1903. 
 
 689 Separating Zinc Sulphides. G. A. Goyder and E. Laughton, Ade- 
 laide, South Australia. Separating zinc sulphide from tailings by 
 passing into water slightly acidulated with sulphuric acid, which 
 generates gas around the sulphide and so causes it to rise to the 
 surface while the gangue falls to the bottom. No. 16,839 of 1903. 
 
 690 Separating Sulphides. A. E. Cattermole, H. L. Sulman and H. 
 K. Picard, London. The use of fatty acids or resin acids for sep- 
 arating sulphides from gangue suspended in water. No. 17,109 of 
 1903. 
 
 691 Oil Concentration. A. E. Cattermole, London. A method of oil 
 concentration, using a small amount of saponified oil and separat- 
 ing the mineral from the gangue by jigging. No. 18,589 of 1903. 
 
 692 Sulphide Recovery from Tailings. G. D. Delprat, Broken Hill, 
 N. S. W., Australia. Improvements in the inventor's process for 
 recovering sulphides from tailings, by passing them into a bath of 
 bisulphate of soda. No. 19,783 of 1903. 
 
 693 Oil Concentration. Sulman & Picard, London. In separating 
 minerals from gangue by oil concentration, introducing the oil in 
 the form of a vapor mixed with jets of air. No. 20,419 of 1903. 
 
 694 Ore Treatment. G. D. Delprat, Broken Hill, New South Wales. 
 Method of making sulphides rise to the surface in a solution of 
 common salt containing 2 per cent sulphuric acid. No. 27,132 of 
 1903. 
 
 695 Oil Concentration. J. D. Wolf, London. Passing ores through 
 petroleum mixed with other oils and chloride of sulphide, and aft- 
 erwards removing any gangue taken up by passing through warm 
 water. No. 4,793 of 1904. 
 
 696 Slime Deposition. H. L. Sulman and H. F. K. Picard, London. 
 Collecting up slimes and depositing them by adding small amounts 
 of soapy matter to the solutions. No. 13,481 of 1904. 
 
 697 Concentration. J. D. Wolf, London. A concentrator of the 
 traveling belt type, in which the mineral particles are separated 
 from the gangue by means of a greasy surface on the belt, and not 
 by concussion or gravity. No. 17,407 of 1904. 
 
MISSOURI SCHOOL OF MINES. 57 
 
 698 Ore Separation. F. E. Elmore, London. The use of a vacuum 
 for increasing the efficiency of the process for floating metallic 
 sulphides by means of bubbles of air or gas, and thus separating 
 them from gangue. No. 17,816 of 1904. 
 
 699 Ore Separation. A Debavay, Melbourne, Australia. Sepa- 
 rating blende from gangue in zinc tailings and concentrate, by mak- 
 ing use of surface tension of water; the tailing is passed gently upon 
 the surface of water, the surface tension being sufficient to sup- 
 port the blende but not the gangue. No. 18,660 of 1904. 
 
 700 Separating Sulphides from Gangue. J. H Gillies, Melbourne, 
 Victoria. In separating sulphides from gangue by the "saline pro- 
 cess," improved apparatus for introducing the material into the 
 vats. No. 20,159 of 1904. 
 
 701 Oil Concentration. A. Schwarz, New York, U. S. A. Adding 
 fatty substances to petroleum, and also sulphur compounds, in order 
 to increase the efficiency of the process for concentrating ores by 
 means of oil. No. 23,906 of 1904. 
 
 702 Sulphide Separation. A. P. S. Macquisten, Glasgow. This in- 
 vention relates to the separation of metallic, sulphides from gangue 
 by flotation. The inventor uses a traveling 1 belt which continuously 
 passes into and out of water. As the belt goes into and out of the 
 water, the particles of sulphide are floated off, leaving nothing but 
 gangue on the belt. No. 25,204 and 25,204A of 1904. 
 
 703 Ore Separation. A. J. F. Debavay, Melbourne, Victoria. Appa- 
 ratus to be used in bringing thin films of ores on the surface of 
 water, by means of which the metallic particles are floated and 
 the gangue sinks. No. 25,858 of 1904. 
 
 704 Concentrating Machine. F. E. Elmore, London. Apparatus in 
 which to conduct the inventors process for conducting flotation- 
 concentration under a vacuum. No. 29,282 of 1904. 
 
 705 Ore Separation. H. L. Sulman, H. F. K. Picard, and J. Ballot, 
 London. The application of surface tension of water for supporting 
 mineral particles with oily surfaces. No. 29,374 of 1904. 
 
 706 Concentrating Ore. Sulman, Picard and Ballot, London. The 
 inventors add a small proportion of alkali, soapy matter, or other 
 substances that diminish the surface tension of water, to the water 
 used in grading, vanning or huddling ores, the addition being for 
 the purpose of increasing the efficiency of the separation. No. 1821 
 of 1905. 
 
 707 Flotation Process Sulman, Picard and Ballot, London. A modi- 
 fication of the flotation process for separating sulphides from 
 gangue, consisting in bringing dry powdered ore on to the surface 
 of acidified water, the metallic particles floating andi the gangue 
 falling. No. 5260 of 1905. 
 
58 MISSOURI SCHOOL OF MINES. 
 
 708 Separation of Sulphides. A. S. Elmore, London. In flotation 
 processes for separating sulphides from gangue, adding to the liquid 
 a soluble chloride as calcium chloride, together with a small portion 
 of free hydrochloric acid. No. 5,953 of 1905. 
 
 709 Flotation Process. A. P. S. Macquisten, Glasgow. Improve- 
 ments in the inventor's flotation process for separating minerals, 
 consisting of the addition of minute quantities of fatty acids to 
 the water. No. 15,119 of 1905. 
 
 710 H. L. Sulman, London. Conducting the process of flotation of 
 sulphides by means of oil at the boiling point of the floating solu- 
 tion. No. 19,709 of 1905. 
 
 711 Concentrator R. E. Saunders, London. A pneumatic apparatus 
 for separating gangue from mineral, consisting of a series of baffle 
 plates, against which the ore is drawn by suction. No. 21,398 of 
 1905. 
 
 712 Flotation Process. H. L. Sulman, H. F. K. Picard and J. Ballot, 
 London. Improvements in the inventor's flotation process for sep- 
 arating certain metallic compounds from gangue, with the object of 
 more equally wetting the various constituents of the ore. No. 26,711 
 of 1905. 
 
 713 Concentration Process. H. L. Sulman, H. F. K. Picard and J. 
 Ballot, London. In the inventor's process for floating minerals from 
 gangue in a saponified oily medium, subjecting the mixture to at- 
 mospheric pressure and subsequently relieving it, thereby releasing 
 gaseous bubbles, which carry up the mineral. No. 26,712 of 1905. 
 
 714 Ore Dressing. Concentrating table. H. L. and E. A. Sulman, 
 London, England. A form of bubble or concentrating table on 
 which the material to be treated is periodically rolled over by a 
 squegee so that the action of the water running down the surface 
 may be more effective in floating off the lighter particles. No. 
 9,981 of 1906. 
 
 715 Flotation Process. G. A. Chapman, Broken Hill, N. S. W. Im- 
 provements in tne Sulman-Picard-Ballot process for flotation of sul- 
 phides by adding fatty acids and agitating in water, consisting in 
 adding to the ore acidified water in one vat and adding the fatty 
 matter subsequently in another vat. No. 17,328 of 1906. 
 
 716 Flotation Processes. H. L. Sulman, London, Eng. In flotation 
 processes for separating ores from gangue in which the ore is ex- 
 posed alternately to the action of air and water, slightly warming 
 the liquid in which the flotation takes place. No. 19,944 of 1906. 
 
 717 Separation Process. Improvements in apparatus for more or 
 less completely separating subdivided solid matter from a liquid. 
 Particularly applicable for thickening ore pulp and for feeding or 
 measuring the pulp or solid. Francis E. Elmore and Alexander F. 
 Elmore, London. No. 26,821 of 1907. 
 
MISSOURI SCHOOL 01? MIN^S. 59 
 
 718 Ore Treatment. Improvements relating to the treatment of 
 ores or the like. A. A. Lockwood and M. R. A. Samuel, London, 
 E. C. No. 12,962 of 1908. 
 
 719 Concentration. Improvements in or relating to the concen- 
 tration of ores. Arthur H. Higgins, Broken Hill,, N. S. W. No. 
 26,352 of 1908. 
 
 720 Concentration. Improvements in or relating to the concentra- 
 tion of ores. H. L. Sulman and H. F. K. Picard, London, England. 
 No. 28,173 of 1908. 
 
 721 Flotation Process. Improvements in and relating to the sepa- 
 ration of zinc blende and other metalliferous constituents from ore 
 concentrates and slimes by flotation or granulation. Edward J. Hor- 
 wood, Broken Hill, N. S. W., Aust No. 1,789 of 1909. 
 
 722 Ore Treatment. Improvements relating to the treatment of 
 ores or the like. A. A. Lockwood and M. R. Anthony Samuel, Lon- 
 don. No. 16,229 of 1909. 
 
 723 Concentration. Improvements in the concentration of oxidized 
 ores. H. L. Sulman and H. F. K. Picard, London, Eng. No. 26,019 
 of 1909. 
 
 724 Concentration. Improvements in or relating to the concentra- 
 tion of ores. H. L. Sulman, A. H. Higgins and J. Ballot, London, 
 Eng. No. 28,933 of 1909. 
 
 725 Concentration. Improvements in or relating to apparatus for 
 ore concentration. T. J. Hoover, London, Eng. No. 6,896 of 1910. 
 
 726 Separation. Improvements in the selective separation of met- 
 als from complex' ores or products. Henry L. Sulman and Hugh K. 
 Picard, London, Eng. No. 8650 of 1910. 
 
 727 Concentration. Improvements in or relating to ore concentra- 
 tion. T. J. Hoover, London, England. No. 10,929 of 1910. 
 
 728 Separation. Improvements in or relating to the separation of 
 ores or the like. Murex Magnetic Co., Ltd., and Alfred A. Lock- 
 wood, London, Eng. No. 13,009 of 1910. 
 
 729 Zinc. Improved treatment of siliceous zinc ores. F. B. Dick, 
 Hampton, Middlesex. No. 17,735 of 1910. 
 
 730 Concentration. Improvements in or relating to the concentra- 
 tion of copper ores. Henry H. Greenway, Melbourne, Australia. No. 
 18,943 of 1910. 
 
 731 Concentration. Improvements in or relating to the concentra- 
 tion of ores. H. H. Greenway, Melbourne, Australia. No. 21,856 and 
 12,857 (?) of 1910. 
 
 732 Concentration. Improvements in or relating to the concentra- 
 tion of ores. H. H. Greenway, Melbourne, Aust., and Henry Lavers, 
 Broken Hill, N. S. W. No. 22,973 of 1910, 
 
60 MISSOURI SCHOOL OF MINES. 
 
 733 Concentration. Improvements in or relating to ore concentra- 
 tion. Henry Lavers, Broken Hill, N. S. W., Minerals Separation, 
 Ltd., and E. H. Nutter, Lond, Eng. No. 23,870 of 1910. 
 
 734 Concentration. Improvements in or relating to method and 
 apparatus for ore concentration. E. H. Nutter and Minerals Sepa- 
 ration, Ltd., London, Eng. No. 23,949 of 1910. 
 
 735 Concentration. Improvements in or relating to ore concentra- 
 tion. E. H. Nutter, London, Eng. No. 2,383 of 1911. 
 
 736 Ore Treatment. Improvements in the Treatment of Ores. Mu- 
 rex Magnetic Co. and A. A. Lockwood, London, Eng. No. 13,208 
 of 1911. 
 
 737 Magnetic Separation. Improvements in or relating to the sep- 
 aration of ores or the like. Murex Magnetic Co., Ltd., and A. A. 
 Lockwood, London, Eng. No. 18,189' of 1911. 
 
 738 Magnetic Separation. Improved process for the magnetic prep- 
 aration or oiling of ores or the like and apparatus therefor. Murex 
 Magnetic Co., Ltd., and A. A. Lockwood, London, Eng. No. 25,469 
 of 1911. 
 
 739 Concentration. Improvements in or relating to ore concentra- 
 tion. G. A. Chapman and S. Tucker, London, Eng. No. 28,929 of 
 1911. 
 
 740 Concentration. Improvements in or relating to ore concentra- 
 tion. G. A. Chapman and S. Tucker and Minerals Separation, Ltd., 
 London, England. No. 14,273 of 1912. 
 
 741 Concentration. Improvements in or relating to apparatus for 
 ore concentration. J. Hebbard, Broken Hill, N, S. W. and Minerals 
 Separation, Ltd., London, Eng. No. 15,546 of 1912. 
 
 742 Ore Concentration. Improvements in or relating to apparatus 
 for concentration. W. Broadbridge, A. C. Howard and Minerals 
 
 Separation, Ltd., London, Eng. No. 25,490 of 1912. 
 
 743 Flotation Process. Process for treating sulphide or carbonate- 
 sulphide ore slimes and ores by flotation. K. Schick, Siegen, Ger- 
 many. No. 25,689 of 1912. 
 
 744 Concentration. Method of and apparatus for concentrating ore 
 and the like. G. S. A. Appelqvist and O. E. Tyden, Stockholm, 
 Sweden. No. 402 of 1913. 
 
 745 Selective Separation of Ores. A. H. Higgins and Minerals 
 Separation Limited. A process for the selective separation of dif- 
 ferent constituents of an ore by flotation consists in the separate 
 treatment of products containing particles of substantially uniform 
 size or containing particles having substantially the same rate of 
 fall in liquid. The factors of differential gaseous attachment and 
 of differential falling power in liquid are thereby utilized, and con- 
 centrates relatively high in certain constituents and residues rela- 
 tively high in others are obtained. The sized or classified products 
 
MISSOURI SCHOOL OF MINES. 61 
 
 may be treated by the process described in 16,141 of 1913, or in the 
 apparatus described in 21,650 of 1913 (C. A. 9,782). The frothing- 
 agent used is preferably partly soluble in H 2 O, such as eucalyptus 
 oil, and is present in very small quantity, more being added during 
 the treatment if required. Acids, alkalies, or soluble salts may be 
 present. Cf. C. A. 8, 1562. No. 1,368 of 1914. 
 
 UNITED STATES 
 
 746 Process of Collecting the Floating Precious Metal from Quartz 
 or Cement-Rock Tailings. Alfred E. Jones, of Newark, New Jer- 
 sey, assignor to himself, John T. Rowland, and Robert Gray, Jr., of 
 same place. Process for collecting and obtaining float-gold from 
 quartz or cement-rock tailings, which consists in, first, passing into 
 such tailings a fibrous pulp; secondly, withdrawing the fibrous ma- 
 terial and the matter commingled therewith; next, pressing the 
 water from the same; and, finally, destroying the fibrous material. 
 No. 267,351. 
 
 747 Method of Saving Floating Materials in Ore-Separation. 
 Hezekiah Bradford, of Philadelphia, Pennsylvania. Method of sav- 
 ing floating materials in ore-separation, consisting in passing the 
 water and floating materials along in an open unobstructed sheet 
 from the table or separating-machine with but little agitation of 
 the water, thus preventing such materials from being carried be- 
 neath the surface and subsiding, then causing the water and floating 
 materials to plunge or fall into a water-receptacle, and then retain- 
 ing said floating materials in said receptacle until they lose their 
 floating power and sink. No. 345,951. 
 
 748 Ore-Slimer. Edgar A. Hockley, of Ouray, Colorado. An ore 
 separator or slimer consisting of a receiving-tank provided with an 
 inclined screw conveyor, a separating-tank provided with perforated 
 pipes located at or near its bottom, and a standpipe connected there- 
 with, said tank being provided with a top and bottom discharge, a 
 vertically-movable gate provided with valves and floats, whereby the 
 discharge of material from the tank is automatically regulated, and 
 a suitable filtering-tank, the three tanks being arranged and con- 
 nected substantially as and for the purpose set forth. No. 466,753. 
 
 749 Method of and Apparatus for Separating Slime or Fines from 
 Water Used in Milling Ores. Albion M. Rouse, of Boulder, Colorado, 
 assignor to George R. Williamson, of same place. An improved 
 method consisting in depositing the mill-tailings into a receptacle 
 through which there is an upward flow of water, then carrying the 
 water and tailings through a chamber, and causing an upward flow 
 of air through the body of water and tailings, forming a scum. No. 
 469,599. 
 
 750 Process of Concentrating Ores. Charles B. Hebron and Carrie 
 J. Everson, of Denver, Colorado. A process for concentrating ores, 
 which consists in first joining the metallic and mineral particles 
 in the pulverized ore with a quantity of buoyant material and then 
 sifting or blowing the prepared ore while in a dry state upon the 
 
62 MISSOURI SCHOOL OF MINES. 
 
 surface of liquid, whereby the buoyed metallic and mineral particles 
 are made to float and thus separate from the gangue, which settles. 
 No. 471,174. 
 
 751 Process of Concentrating Ores. Charles B. Hebron, of Denver, 
 Colorado, assignor of five-sevenths to Carrie J. Everson, of same 
 place, Mamie W. Hutchinson, of Topeka, Kansas, and Charles T. 
 Brown, of Chicago, Illinois. Process for concentrating ore, con- 
 sisting of producing by heat a vacuumed and expanded condition 
 in the mineral and metallic particles of the ore, of presenting to 
 such ore while in a heated, vacuumed, and expanded condition, and 
 by movement and pressure mechanically joining with the mineral 
 and metallic particles thereof particles of buoyant material, of 
 cooling and aerating such buoyed mineral and metallic particles, 
 and of presenting such prepared ore stock to the surface of liquid, 
 so that the buoyed mineral and metallic particles of the ore stock 
 are maintained upon the surface of such liquid for a greater length 
 of time than the rock matrix of the ore stock and thereby for such 
 time separated therefrom. No. 474,829. 
 
 752 Method of and Apparatus for Separating Graphite or Like Sub- 
 stances from Crushed Rock. Axel. W. Nibelius, of Hackettstown, 
 New Jersey. The process of separating graphite and like sub- 
 stances from the crushed rocks, which consists in causing a falling 
 body of dry and crushed rock to meet a vertically and upwardly 
 moving body or stream of water at the surface of and within a sur- 
 rounding body of comparatively still water, on whic'i surface the 
 flakes of graphite or other substance not absorbing water are sep- 
 arated and are floated off on the overflowing water, while the water- 
 absorbing particles are precipitated in the water. No. 486,495. 
 
 753 Separation of Metals and Metallic Compounds from Ores or 
 Other Substances. George Robson, of Dolgelly, England, assignor 
 to himself, and Samuel Crowder, of London, England. The method 
 of recovering metals and metallic compounds from finely-divided 
 substances, which consists in thoroughly and mechanically agitat- 
 ing and mixing a fatty oil with said substances while the same are 
 in a moist or plastic state due to admixture of water therewith, 
 then drawing off the fatty oil, carry the metal particles, and metallic 
 compounds from said substances, and then separating the metals 
 and metallic compounds from the oil. No. 575,669. 
 
 754 Apparatus for Separating Metallic from Rocky Constituents of 
 Ores. Francis E. Elmore, Leeds, England. The combination in an 
 apparatus for separating metallic from rocky constituents of ore; 
 of a rotary drum having internal helical ribs, pipes for delivering 
 oil and ore and water into one end of said drum, a water-subsiding 
 vessel arranged below the drum and receiving the oil, ore and water 
 therefrom, a centrifugal drum arranged below said water-subsiding 
 vessel, and a pipe for conducting the metallic portions and the oil 
 from the top of the water-subsiding vessel into said centrifugal 
 drum. No. 653,340 ? 
 
MISSOURI SCHOOL OF MINES. 63 
 
 755 Apparatus for Separating Solid Bodies from Liquids. Denis 
 Gale, of Denver, Colorado. In a separating apparatus, the combina- 
 tion with a vessel, consisting of two chambers, means for causing 
 water in one chamber to flow in a thin sheet over the surface of 
 water in the second chamber, a conduit with a flat bottom com- 
 municating with the surface of the water in the second chamber, 
 and a slide adjustable over the surface of the water in the second 
 chamber. No. 655,338. 
 
 756 Process of Separating Metallic from Rocky Constituents of 
 Ores. Francis E. Elmore, Leeds, England. The process of separat- 
 ing the metallic from other constituents of ore, which consists in 
 mixing with crushed ore to which sufficient water has been added 
 to make a flowing mixture, a substance other than mercury, to 
 which the metallic particles only will adhere, and then recovering 
 the metallic particles from such substance. No. G76,679. 
 
 757 Apparatus for Separating or Concentrating Minerals or Ores. 
 Henry Peareth Hawdon Brumell, of Buckingham, Canada. In an 
 apparatus for separating or concentrating minerals or ores, a vessel 
 adapted to contain a body of still water, a water-supply pipe pro- 
 jecting into said tank below the water-level, said pipe being pro- 
 vided with a nozzle having a discharge directed toward a point of 
 the end wall of the vessel intermediate the water-level and the level 
 of the nozzle, whereby a thin stream of water will be projected 
 against said wall and deflected thereby across the surface of the 
 body of wate in the vessel to a discharge at the opposite end of 
 the vessel, and a hopper adapted to deliver the material to be sep- 
 arated to said stream. No. 678,860. 
 
 758 Graphite-Separator. John H. Davis, of Glens Falls, New York, 
 assignor to United States Graphite Company, of same place. A 
 water graphite-separator of trough-like construction, provided with 
 means near the bottom of the trough for distributing the inflowing 
 water to the machine; in combination with means for conveying 
 the water and the graphite on the surface thereof in one direction 
 and additional means for conveying the tailings in a different direc- 
 tion by the action of gravity and a part of the water; together with 
 a horizontally-disposed perforated partition located above the tail- 
 ings-conveying means. No. 679,473. 
 
 759 Ore-Separator. Alexander A. Allen, of Birmingham, Alabama. 
 The combination with a vessel arranged to discharge by overflow 
 a broad, unbroken sheet of liquid, a receptacle arranged at a lower 
 level to contain a body of approximately still water and to discharge 
 by overflow at one side, a broad inclined chute extending from said 
 vessel to a point in said receptacle below the plane of discharge of 
 the latter and arranged to receive the sheet discharged by said 
 vessel and deliver it substantially unbroken in said receptacle, and 
 means for placing upon the moving sheet discharged from said ves- 
 sel a thin layer of material to be separated. No. 688,279. 
 
 760 Separating Mineral Substances by the Selective Action of Oil. 
 Alexander Stanley Elmore, of London, England. The process for 
 separating metallic and rocky constituents of ore, which consists in 
 
64 MISSOURI SCHOOL OF MINtfS. 
 
 mixing pulverized ore with water and mixing the ore and water 
 with oil in the presence of an acid, allowing the mixture to rest, 
 whereby the oil having the metallic substances entrapped in it 
 floats at the top of the mixture, and separating the metallic con- 
 stituents from the oil. No. 689,070. 
 
 761 Apparatus for Separating Minerals by Selective Action of Oils. 
 Alexander S. Elmore, London, England. The combination in an 
 apparatus for separating metallic from rocky constituents of ore, 
 of a trough, a shaft adapted to revolve within said trough and pro- 
 vided with inclined blades, pipes for delivering oil and water to 
 said trough, a subsidence-tank arranged at one end of said trough, 
 extending below the same and communicating therewith, said tank 
 adapted to receive the liquid mineral pulp and oil from said trough, 
 a vertically-extending partition arranged in said tank at the top 
 thereof for the purpose set forth, a centrifugal drum arranged at 
 one side of said tank, a pipe connected to said tank and communi- 
 cating with said drum for discharging therein the metallic ingred- 
 ients and the oil, and a pipe connected to the tank for discharging 
 therefrom the earthy and rocky ingredients. No. 692,643. 
 
 762 Apparatus for the Separation of Minerals by the Selective 
 Action of Oils, etc. Alexander S. Elmore, London, England. In 
 apparatus for affecting separation of minerals by the selective 
 action of oils and like substances, the combination of a stepped 
 incline for downflow of the mixed pulp and oil, with a traveling 
 apron arranged over and in suitable proximity to the said stepped 
 incline for downflow of the mixed pulp and oil with a traveling 
 No. 703,905. 
 
 763 Ore-Separator. John W. Wolf, Randolph, Iowa. In a separator, 
 the combination with tank adapted to contain liquid, of a sub- 
 merged hopper therein, and vibrating collecting-pan in the tank 
 under the hopper, covered by a convex separating-sieve which is 
 close to the lower edge of the hopper, forming a narrow escape- 
 opening therebetween. No. 725,609. 
 
 764 Ore-Separator. Charles F. Wheelock, Birmingham, Alabama. 
 The combination of a vessel adapted to be filled with water and 
 provided with means for precisely determining the level of the 
 water, a chute declining toward and adapted to reach said level; 
 a transverse water-pipe slightly below the water-level, approximately 
 parallel with and in proximity to the discharge edge of the chute 
 and discharging laterally in the same general direction as the chute; 
 means for delivering water under pressure to said pipe; means for 
 regulating said pressure; and means for causing a thin, uniform 
 stream of dry graphite to descend the chute. No. 734,641. 
 
 765 Extraction of Zinc, Lead and Silver Sulphides from Their Ores. 
 Guillaume D. Delprat, Broken Hill, New South Wales, Australia, 
 The method of separating ores from gangue, which consists in form- 
 ing a bath containing nitric acid, feeding finely ground ore thereto, 
 whereby gas bubbles will be formed on the ore particles to raise 
 
MISSOURI SCHOOL OF MINES. 65 
 
 them to the surface of the solution, and removing the particles of 
 ore so lifted to the surface. No. 735,071. 
 
 766 Process of Purifying Graphite. Moritz Friedrich Reinhold 
 Glogner, Freiburg, Germany. A process for purifying graphite in 
 a wet and cold manner by the use of water and pstroleum, consist- 
 ing in the following operations: purifying the graphite mineral 
 from its heavy admixtures (as for instance quartz, iron and the 
 like) by a washing with cold water; mixing said purified graphite 
 mineral with about three or four times its weight of cold water; 
 very strongly agitating said paste within a closed vessel after the 
 addition of a quantity of petroleum of about half the weight of the 
 pure graphite contained in the mixture; and then sprinkling water 
 over the surface of the liquid, after the mixture has been allowed 
 to stand, in order to obtain a quicker and more complete separa- 
 tion of the graphite particles from the earthy substances. No. 
 736,381. 
 
 767 Apparatus for Extracting Gold and Other Metals from Ores. 
 Edmund L. Vander Naillen, San Francisco, Cal. An apparatus com 
 prising a concentrating tank provided with an inlet and an outlet, 
 and a valve disposed transversely within the tank and operating 
 when closed to separate the lower portion of the tank from the 
 upper portion thereof. No. 737,533. 
 
 768 Process of Preparing Concentrating-surfaces. Arthur De Wint 
 Foote, Grass Valley, California. The process of preparing a con- 
 centrating-surface, consisting in commingling petroleum and lime 
 and spreading the same evenly over the surface of a concentrator. 
 No. 744,322. 
 
 769 Apparatus for Separating Graphite or other Materials from Asso- 
 ciated Impurities. Israel F. Good, Allentown, Pennsylvania, assignor 
 of one-half to George Francis Pettinos, Bethlehem, Pennsylvania, 
 and John Herbert Harris, Allentown, Pennsylvania. An apparatus 
 comprising a rotary receiving-table, and pneumatic means for hold- 
 ing the finer particles of graphite thereon while the coarser por- 
 tions escape. No. 745,960. 
 
 770 Process of Separating Zinc Blende from Ores. William Jamie 
 son and Francis J. Odling, Melbourne, Victoria, Australia. In the 
 separation of zinc-blende from ore with which it is associated, treat- 
 ing the ore in a pulverized state and sufficiently wet condition with 
 chlorine, for the purpose of attacking the surface of the zinc-blende 
 and submitting the ore so treated to a vanning motion. No. 750,034. 
 
 771 Mineral-Separator. Homer L. Orr, Greeley, Colorado. In a min- 
 eral-separator the combination of a receiving-tank, a separating- 
 tank, a filtering-tank, a pipe or vessel connecting the filtering-tank 
 and the receiving tank having therem a shaft provided with spiral 
 blades, and means located in the receiving-tank and driven by the 
 inflowing water for operating said shaft to return the filtered liquid 
 to the receiving tank, substantially as described, and a feed-pipe 
 from the receiving tank to the separating-tank. No. 758,464. 
 
66 MISSOURI SCHOOL OF MIXES. 
 
 772 Apparatus for the Concentration of Minerals by Means of Oil. 
 James \V. Van Meter and Martin P. Ross, San Francisco, California. 
 An apparatus for concentrating minerals by means of oil, compris- 
 ing a channel through which the oil flows, means for supplying pulp 
 and water to the oil at the head of said channel, means in said 
 channel at intervals for drawing off the settled gangue and water, 
 means at the foot of said channel for separating the relatively 
 upper and lower portions of the oil, and means for returning said 
 separated upper portion of oil to head of the channel. No. 762,774. 
 
 773 Separation of the Metallic Constituents of Ores from Gangue. 
 Arthur E. Cattermole, Highgate, London, England. A process of 
 separating metalliferous matter from gangue, which consists in 
 agitating a mixture of powdered ore and water with oil in emulsion 
 in water containing an alkaline emulsifying agent, so as to ag- 
 glomerate the oil-coated particles into granules, and subjecting the 
 mixture to classification to remove the small non-coated particles 
 from the granules. Nos. 763,259 and 763,260. 
 
 774 Apparatus for Use in Certain Processes of Extracting Sulphides 
 from Ores. Guillaume D. Delprat, Broken Hill, New South Wales, 
 Australia, assignor to Broken Hill Proprietary Company, Ltd., Mel- 
 bourne, Victoria, Australia. In an ore concentrating apparatus in 
 which the concentrates are floated to the top of a body of liquid, 
 a pan having an inclined perforate bottom down which the ore 
 slides, means to feed liquid to the pan, a sump at the lower edge 
 of the bottom for tailings, a discharge for concentrates at the liquid 
 level of the pan, a baffle-plate between tne sump and pan extending 
 from the discharge to near the lower edge of the inclined bottom to 
 maintain a quiescent body of liquid in the sump and at the same 
 time maintain a flow of liquid from the pan through the discharge. 
 No. 763,662. 
 
 775 Process of Effecting the Separation of Minerals. George A. 
 Goyder and Edward Laughton, Adelaide, South Australia, Australia. 
 In a method of separating minerals and extracting some of them 
 as concentrates, the steps of moving the ore in a finely-divided state 
 in a solution which by the production of gas causes certain of the 
 minerals contained in said ore to rise; and deflecting and guiding 
 them as they rise. No. 763,749. 
 
 776 Process of Separating Carbon from Pulverized Carbonaceous 
 Materials. James D. Darling, Philadelphia, Pa. A process of sepa- 
 rating carbon from pulverized carbonaceous material, which consists 
 of mixing oil with said material; and flowing water through the mix- 
 ture and through an obstruction impervious to the commingled oil 
 and carbon, but previous to the water and gangue. No. 763,859. 
 
 777 Process of Separation. Alfred Schwarz, New York, N. Y., as- 
 signor to Charles N. Lindley, individually and as trustee, New York, 
 N. Y. A process of separating different materials by the selective 
 action of two liquids of different specific gravities, which consists 
 in introducing the materials in a granular or pulverulent condition, 
 
MISSOURI SCHOOL OF MINES. 67 
 
 quietly, without downward impetus, and without agitation, into a 
 bath of oil floating upon water. No. 766.,289. 
 
 778 Extracting Zinc or Other Sulphides from Their Ores. Guil- 
 laume D. Delprat, Broken Hill, New South Wales, Australia. A 
 method of separating ores from their gangue, which consists in 
 forming an aqueous solution of an acid capable of reacting with 
 the ore to form a gas and increasing the density of said solution 
 by adding thereto a suitable substance, then feeding the mixture 
 of ore and gangue to the solution, decreasing the density of the gas 
 as it is formed on the ore particles, and removing the ore particles 
 raised to the surface. No. 768,035. 
 
 779 Separation of Metals from Their Ores. Joseph B. Scammell, 
 London, England. The process consists in bringing finely-ground 
 ore suspended in water into contact with chloride of sulphur diluted 
 from 200 to 400 times with oil matter, whereby the metallic par- 
 ticles combine with the sulphochlorinated oil. No. 770,659. 
 
 780 Separation of Mineral Substances by Means of the Selective 
 Action of Oil. Cosmo Kendall, Upper Norwood, England. A pro- 
 cess for the treatment of finely-divided material for the separation 
 of graphic substance contained therein from associated rocky matter 
 or gangue, consisting in mixing said material with water, bringing 
 said material intimately into contact or thoroughly mixing it with 
 suitable pure thin oil, as kerosene oil or paraffin oil. projecting 
 at a considerable velocity the mixture so produced under the sur- 
 face of a volume composed of said material, water and oil, allow- 
 ing oil and graphitic substance adhering thereto to r>ass upward to 
 said surface, and drawing off from said surface oil and graphitic 
 substance immediately on arrival at said surface. No. 771,075. 
 
 781 Process of Concentrating Ores. Alice H. Schwarz, New York, 
 N. Y., assignor to Schwarz Ore Treating Company. A method of 
 concentrating ores, which consists in mixing a melted fatty matter 
 which is solid at normal temperatures with the ore, then solidify- 
 ing the fatty matter and separating the gangue from the values 
 entrained in the fatty matter while the latter is solidified. No 
 771,277. 
 
 782 Process of Separating Metals from Sulphide Ores. Charles V. 
 Potter, Balaclava, Victoria, Australia. A process of separating 
 metals from pulverized sulphide ores which consists in adding to 
 the same an acid solution which is a nonsolvent of the precious 
 metals, then applying heat to the same, and removing the sulphides 
 from the surface of the solution. No. 776,145. 
 
 783 Apparatus for Recovering Precious Metals. Virginia Tunbridge, 
 Newark, New Jersey, Administratrix of John Tunbridge, Deceased. 
 An apparatus comprising a supply-channel, a screen at the end of 
 said supply-channel, a separator connected with the outlet of said 
 supply-channel, a screen located at the outlet of the separator and 
 provided with means for holding soap, and a filter connected with 
 the outlet of the separator. No. 777,159, 
 
68 MISSOURI SCHOOL OF MINKS. 
 
 784 Separation of the Metallic Constituents of Ores from Gangue. 
 Arthur E. Cattermole, London, England. A process of separating 
 metalliferous matter from gangue, which consists in mixing the 
 pulp with an amount of oil equaling only a fraction of the metal- 
 liferous constituents, agitating the mass until the oil-coated metal- 
 liferous matter is agglomerated into granules, and subjecting the 
 mixture to classification to remove the small noncoated particles 
 from the granules. Xo. 777,273. 
 
 785 Concentration of Minerals from Ores. Arthur E. Cattermole, 
 Henry L. Sulman, and Hugh F. Kirkpatrick-Picard, London, England. 
 A process of concentrating ores which consists in mixing the ore 
 pulp with soap solution and a mineral acid so as to liberate from 
 the soap the organic acid which coats the desired mineral particles, 
 but not the gangue, agitating the mixture so as to agglomerate the 
 coated mineral particles into granules and separating the granules 
 from the non-coated gangue. No. 777,274. 
 
 786 Apparatus for Separating Sulphides from Their Ores. James 
 H. Gillies, Melbourne, Victoria, Australia. An apparatus for sep- 
 arating sulphides from ores, comprising a treatment pan or vessel, 
 means for heating the same, means for conveying a supply of cool 
 or cold liquid to the bottom of said pan, and means for permitting 
 said liquid to escape from the bottom of the pan to carry away the 
 drossy matter without lowering the temperature or the level of the 
 heated liquid in the upper part of said treatment pan or vessel. 
 No. 778,747. 
 
 787 Apparatus for Recovering Zinc or Other Sulphides from Their 
 Ores. James H. Gillies, Melbourne, Victoria, Australia. In an ap- 
 paratus for recovering zinc and other sulphides from their ores 
 by the wet or chemical process, and in combination, a receptacle, a 
 series of radial over-lapping inclined V-shaped catchment-chutes so 
 placed as to guide the rising metallic gaseously-supported particles 
 and on their falling receive and automatically discharge the same, 
 said catchment-chutes being so arranged that each slightly overlaps 
 its neighbor on one side, a central escapement-channel into which 
 said particles fall, and means for removing said particles from said 
 channel. No. 780,281. 
 
 788 Apparatus for Separating and Concentrating Minerals. George 
 A. Goyder and Edward Laughton, Adelaide, South Australia, Aus- 
 tralia. Apparatus for separating minerals and extracting some of 
 them as concentrates, consisting of a vessel adapted to contain a 
 solution, the floor of such vessel being partly horizontal and partly 
 inclined and provided with means for heating the solution, a feed- 
 ing-hopper extending across one end of said vessel adapted to feed 
 ore or minerals in a finely divided state, a series of transverse rod- 
 rakes, and means for moving them at a regulated speed along the 
 bottom of the vessel from the feed to the discharge end, inclined 
 deflectors along and above the bottom of the separating portion of 
 the vessel, trough-receptacles arranged parallel with the said de- 
 flectors and at such distance from the bottom of the vessel as to 
 enable the gas-raised particles of mineral to be deflected, guided, 
 
MISSOURI SCHOOL OF MINES. 69 
 
 deposited and collected therein, sloping extensions of said troughs 
 and angular rakes for discharging the concentrates from the troughs 
 through the sloping extension of the vessel. No. 784,999. 
 
 789 Separation of Metals from Their Ores. Jacob D. Wolf, Lon- 
 don, England. A process of separating metals from their ores which 
 consists in agitating pulps with oil until the oil has taken up all 
 the metallic-mineral contents with some gangue, separating the 
 mineral-bearing oil from the pulps, removing suspended particles of 
 gangue from the oil by passing it through warm water and sepa- 
 rating metallic minerals from the oil. No. 787,814. 
 
 790 Ore Concentration. Arthur E. Cattermole H r nry L. Sulman. 
 and Hugh F. Kirkpatrick-Picard, London, England. A process of 
 concentrating ores which consists in mixing a freely flowing ore 
 pulp with a soap solution and a mineral acid so as to liberate the 
 organic-acid from the soap throughout the suspended ore mass in 
 intimate contact therewith, whereby the organic acid coats the 
 desired mineral particles and not the gangue, and thereafter sep- 
 arating the coated mineral matter from the non-coated gangue. 
 No. 788,247. 
 
 791 Mineral Reclaimer and Saver. Homer L. Orr and Fred B. Fin- 
 ley, Fort Collins, Colorado. In a tank divided into a plurality of 
 compartments of different sizes, a screen arranged in the larger 
 compartment, a trough arranged below the screen, a plurality of 
 compartments, each containing a filtering medium and means for 
 supplying oil and water to the compartments, and means for caus- 
 ing the liquids to traverse a tortuous path therethrough. No. 
 790,913. 
 
 792 Apparatus for Saving Precious Values in Soils. Benjamin Wm. 
 Rice, Caldwell, Idaho. An apparatus for saving metallic values 
 from sand, gravel, etc., comprising a shaking-screen, a trough sup- 
 ported by arms secured to said screen, a screen-box, bars supported 
 by said screen and positioned underneath the exit end of said 
 trough, a tank adapted to contain water and oil and positioned 
 underneath said screen box, sprocket-wheels mounted within and 
 upon the upper edge of said tank, a sprocket-chain traveling about 
 said wheels, cross pieces secured at intervals to the links of said 
 chain and projecting laterally from the sides of the chain and 
 adapted to travel adjacent to the bottom of the tank substantially 
 its entire length, and a gate positioned within said tank and under- 
 neath which said cross-piece upon the chain are adapted to travel. 
 No. 792,617. 
 
 793 Ore Concentration. Henry Livingstone Sulman and Hugh Fitz- 
 alis Kirkpatrick-Picard, London, England. A process of concen- 
 trating ores which consist in bringing the pulp into intimate con- 
 tact with "oil" in the form of spray and with a gas and thereafter 
 separating the metalliferous constituents from the gangue. No. 
 793,808. 
 
 794 Means for Effecting Aqueous Separation. James D. Darling, 
 Philadelphia, Pennsylvania. An apparatus for effecting aqueous 
 
70 MISSOURI SCHOOL OF MINES. 
 
 separation which consists of a receptacle; a water inlet and outlet 
 to the same with means for regulating the flow of both; a for- 
 aminate partition interposed within the receptacle on the side 
 toward which the water flows; an agitating apparatus within the 
 receptacle on the side of the partition toward which the water en- 
 ters; and propeller-blades in proximity to the partition by the rota- 
 tion of which the material in the receptacle may be constantly 
 driven away from the partition in opposition to the flow of the cur- 
 rent. No. 795,823. 
 
 795 Treatment of Sulfids and Complex Ores. Charles H. Ward, 
 Sydney, New South Wales, Australia. A process of roasting ores 
 in the presence of heated gases, which consists in first passing the 
 ore through a current of such gases in a direction opposite to the 
 flow thereof, and subsequently causing the ore and the current of 
 gases to move together in the same direction, and reducing the 
 temperature of the heated gases as they and the ore are moved 
 together in the same direction. No. 799,696. 
 
 796 Process for Concentrating Ores. Walter Murray Sanders, lola, 
 Kansas. The methods of concentrating ore, which consists i->. sub- 
 jecting it to a non-acid solution capable of reacting with evolution 
 of gas, and collecting such particles as are sustained by the evolved 
 gas. No. 805,382. 
 
 797 Process of Concentrating Ores. Alfred Schwarz, New York, 
 N. Y., Assignor to Schwarz Ore Treating Company, Phoenix, Ari- 
 zona Territory, a corporation of Arizona Territory. The method of 
 treating ores which consists in subjecting a non-sulfid ore to the 
 action of a soluble sulfid to convert the mineral into a sulfid, then 
 treating the mass with a hydrocarbon and finally separating the 
 hydrocarbon with the entrapped metallic constituents of the ore 
 from the tailings. No. 807,501. 
 
 798 Process of Concentrating Ores. Alfred Schwarz, New York, 
 N. Y. Assignor to the Schwarz Ore Treating Company, Phoenix, 
 Arizona Territory, a corporation of Arizona Territory. The method 
 of concentrating ores which consists in mixing with the pulverized 
 ore an agent to which the metallic constituents will adhere, con- 
 sisting of a mixture of a normally non-liquid resinous hydrocarbon 
 and a non-resinous hydrocarbon, then separating said adhesive 
 agent with the entrprmecl vniues from the tailings, and finally sep- 
 arating the values from said agent. No. 807,502. 
 
 799 Process of Concentrating Ores. Alfred Schwarz, New York, 
 N. Y., assignor to the Schwarz Ore Treating Company, Phoenix, 
 Arizona Territory, a corporation of Arizona Territory. The process 
 of concentrating ores consisting of mixing with the pulverized ore 
 a selective agent consisting of a mixture of a liqufd hydrocarbon 
 and a normally solid fatty matter, which mixture is solid at normal 
 temperatures, separating said agent with its entrapped values from 
 the tailings, and finally recovering the values from the selective 
 agent. No. 807,503. 
 
MISSOURI SCHOOL OF MINES. 71 
 
 800 Process of Concentrating Ores. Alfred Schwarz, New York, 
 N. Y., Assignor to Schwarz Ore Treating Company, Phoenix, Ari- 
 zona Territory, a corporation of Arizona Territory. The process of 
 concentrating ores consisting in melting a normally solid hydro- 
 carbon, mixing dry pulverized ore therewith, separating said hydro- 
 carbon with its entrapped values from the tailings by subjecting 
 the mixture to the action of a bath of heated water while main- 
 taining said hydrocarbon in a melted condition, and finally recov- 
 ering the values from the hydrocarbon. No. 807,504. 
 
 801 Process of Concentrating Ores. Alfred Schwarz, of New York, 
 N. Y., assignor to Schwarz Ore Treating Company of Phoenix, Ari- 
 zona Territory, a corpoation of Arizona Territory. The process of 
 concentrating ores consisting in mixing the ore out of contact with 
 water with an adhesive agent composed of a hydrocarbon and sulfur, 
 separating said agent with the entrapped values from the tailings, 
 and recovering the values from the adhesive agent. No. 807,505. 
 
 802 Process of Concentrating Ores. Alfred Schwarz, of New York, 
 N. Y., assignor to Schwarz Ore Teating Company, of Phoenix, Ari- 
 zona Territory, a corporation of Arizona Territory. The process of 
 concentrating ores consisting in melting a normally solid resinous 
 hydrocarbon, mixing the pulverized ore therewith and separat- 
 ing said hydrocarbon with its entrapped values from the tailings, 
 and finally recovering the values from the resinous hydocarbon. 
 No. 807,506. 
 
 803 Process of Separating Minerals. Edmund B. Kirby, of Ross- 
 land, Canada. The process of separating minerals, which consists 
 in mixing together the pulverized mineral material, a considerable 
 quantity of water, and a solution of bitumen and kerosene; in 
 gently agitating this mixture, and in blowing a gas into the same 
 to assist in the flotation of said solution and the mineral particles 
 which have been coated thereby; and in separating said solution 
 and mineral particles. No. 809,959. 
 
 804 Process of Recovering Values from Sulfid Ores. Edwin C. 
 Pohle, Reno, Nevada. The process of recovering values from sul- 
 fid ores which consists in mixing the ore with a chlorid, subjecting 
 the mixture to heat in an oxidizing atmosphere, cooling the product, 
 leaching the mass with water, to remove the contained bodies solu- 
 ble therein, leaching the residue with a solution of a cyanid of an 
 alkali metal, and finally, precipitating the gold and silver from the 
 solution. No. 811,085. 
 
 805 Graphite-Separator. John Henry Davis, of Glens Falls, New 
 York. A graphite-separator, comprising a main trough, means for 
 feeding graphite ore and water thereto, means for maintaining a 
 water-level in the trough, and a series of partitions in the trough, 
 each provided with a separating-plate having its front end located 
 just below said water-level; each of said plates being provided with 
 means for, carrying away fine sand and mud from a point near 
 the surface of the water. No. 816,303. 
 
 806 Ore-Separator. Fred B. Finley, of Los Angeles, California. In 
 an ore-separator, the combination of a tank provided with an outlet- 
 
72 MISSOURI SCHOOL OF MINES. 
 
 valve, a combined hopper and coil mixer arranged within the tank, 
 a second tank into which the first tank discharges, a third tank into 
 which the second tank discharges, a float-operated valve in the sec- 
 ond tank for controlling passage of oil to the third tank, a valve in 
 the first tank, a rock-beam, and a connection between the rock- 
 beam and the float of the second tank and the valve of the first 
 tank. No. 822,515. 
 
 807 Separator for Use in the Concentration of Ores. Alfred 
 Schwarz, of New York, N. Y., assignor to Schwarz Ore Treating 
 Company, of Phoenix, Arizona Territory, a corporation of Arizona 
 Territory. In a separator for use in the concentration of ores the 
 combination of a kettle adapted to contain water, shelves supported 
 within said kettle, scrapers cooperating with said shelves to impart 
 a continuous movement to the contents of the kettle, an over-flow- 
 discharge outlet at the top for the concentrates and adhesive agent, 
 and a discharge-outlet at the bottom of the kettle for the tailings 
 No. 825,080. 
 
 808 Process for Separating Finely-Divided Material. Francis Ed- 
 ward Elmore, of London, England. A process of separating certain 
 constituents of finely-divided material consisting in mixing the ma- 
 terial with a liquid and a substance that has a selective affinity for 
 some of the constituents, subjecting the mixture to a pressure below 
 that of the atmosphere and collecting the particles floated. No. 
 826,411. 
 
 809 Ore Concentration. Henry Livingstone Sulman, Hugh Fitzalis 
 Kirkpatrick-Picard, and John Ballot, of London, England. The pro- 
 cess of concentrating powdered ores which consists in separating 
 the mineral from the gangue by coating the mineral with oil in 
 water containing a small quantity of oil, warming the mixture, agi- 
 tating the mixture to form a froth, and separating the froth. No. 
 835,120. 
 
 810 Ore Concentration. Henry. Livingstone Sulman, of London, 
 England. A process for concentrating ores which consists in mixing 
 the powdered ore with water, adding a small proportion of oily 
 liquid having? a preferential affinity for metalliferous matter, agitat- 
 ing the mixture, heating the mixture until gaseous bubbles are 
 generated therein so that the oil-coated mineral matter forms into 
 a froth and separating the froth from the remainder by flotation. 
 No. 835,143. 
 
 811 Ore Concentration. Henry Livingstone Sulman, Hugh Fitzalis 
 Kirkpatrick-Picard, and John Ballot, of London, England, assignors 
 to Minerals Separation, Limited, of London, England. The process 
 of separating powdered minerals from one another which consists 
 in suspending the powdered minerals in a liquid, subjecting the mix- 
 ture to a gas-pressure and thereafter relieving the pressure whereby 
 bubbles of gas are liberated in the pulp and carry certain minerals 
 to the surface. No. 835,479. 
 
 812 Separating-Tank. Edmund B. Kirby, of Rossland, British Co- 
 lumbia, Canada. The combination of a separating-tank containing 
 
MISSOURI SCHOOL OF MINES. 73 
 
 agitator mechanism, with means for discharging into the contained 
 fluid charge a gas and a liquid lighter than water and immiscible 
 therewith. No. 838,626. 
 
 813 Process of Concentrating Ores. Alfred Schwarz, of New York, 
 N. Y., assignor to Schwarz Ore Treating Co., of Phoenix, Arizona 
 Territory, a corporation of Arizona Territory. The method of con- 
 centrating ores consisting in mixing with the pulverized ore rosin- 
 oil, then separating said agent with its entrapped values from the 
 tailings and finally recovering the values from said agent. No. 842,255. 
 
 814 Apparatus for Separating Minerals. James Francis Latimer, of 
 Toronto, Ontario, Canada. An apparatus comprising a vessel pro- 
 vided with a funnel-shaped bottom having a controlled discharge- 
 opening at the apex thereof; an upwardly-sloping deflecting plate 
 extending into said vessel; a screen of suitable mesh supported 
 within said vessel at the top of the funnel-shaped bottom thereof; 
 a rotatable pipe or conduit for introducing water into said vessel and 
 having its discharge-end opening below said screen; horizontally- 
 held paddles supported by said conduit at the required angle and 
 designed to operate above said screen so as to create a centrifugal 
 force so as to divide the graphite from the rocky matter or gangue 
 and at the same time create an additional upward current in the 
 water above said screen to that caused by the flow of water up- 
 ward through said screen so as to cause the oil-provided graphite 
 to rise to the top of the water so that it may be caught by said 
 deflecting plate and so conducted out of said vessel. No. 851,599. 
 
 815 Process for Separating Minerals. James Francis Latimer, of 
 Toronto, Ontario, Canada. The process of separating graphite and 
 similar substances from rocky matter and gangue, consisting in 
 mingling the crushed ore with oil; delivering the oil-provided mass 
 to; and maintaining it in an upflowing current of water; centrifug- 
 ally agitating the mass to separate the components and so acceler- 
 ate the current as to carry the oil-provided graphite to the top of 
 the water; flowing the so separated graphite away; settling the 
 gangue through an upflowing current of reduced speed below the 
 zone in which the material is fed and agitated, and removing said 
 gangue by a downwardly-flowing current. No. 851,600. 
 
 816 Process of Separating Zinc-Blende by 1 Flotation. Auguste Jo- 
 seph Francois Debavay, of Kew, Victoria, Australia. A process of 
 separating zinc blende particles from ores, tailings, and concen- 
 trates in a pulverized condition comprising the freeing of zinc blende 
 particles from the carbonates and other impurities by first submit- 
 ting the material to the action of a chemical re-agent, and then dis- 
 charging the material in a film-like manner into a body of water 
 by delivering the material in a thin pasty condition in the pres- 
 ence of a stream of water upon an inclined surface extending to 
 said body of water, and then separating the zinc blende floating 
 on the water from the remaining ores, tailings, or concentrates 
 which precipitate in the body of water. No. 864,597. 
 
 817 Method of Separating the Metallic anl Rocky Constituents of 
 Ores. Dudley H. Norris, of New York, N. Y. The method of sep- 
 arating the metallic and rocky particles of ore, which consists in 
 
74 MISSOURI SCHOOL OF MINKS. 
 
 introducing a stream of water containing air in solution into a 
 mixture composed of crushed ore, oil and water to cause bubbles of 
 air to form in said mixture and rise to the surface thereof to carry 
 off the metallic particles of the ore. No. 864,856. 
 
 818 Process for Separating Solids. Arthur P. Stanley Macquisten, 
 of Glasgow, Scotland. A process for separating solids having differ- 
 ent surface affinities for liquids, consisting in forming a pulp of 
 the mixture, bringing the commingled particles through the sur- 
 face of a gently flowing stream of liquid and returning the same to 
 the stream in a direction transverse to the flow of the stream, 
 and collecting concentrates thereby caused to float upon the stream. 
 No. 865,194. 
 
 819 Apparatus for Separating Solid Particles from Each Other. 
 Arthur P. Stanley Macquisten, of Glasgow, Scotland. Means for 
 separating a mixture of finely divided particles of ore, comprising a 
 cylinder arranged to rotate in contact with a body of liquid, said 
 cylinder passing through the surface of the liquid in such direc- 
 tion as to carry the particles there through and to cause them to 
 roll' back to the surface of the liquid, said cylinder having a ribbed 
 interior surface. No. 865,195. 
 
 820 Apparatus for Separating Solid Particles from Each Other. 
 Arthur Penrhyn Stanley Macquisten, of Glasgow, Scotland. Means 
 for separating a mixture of finely-divided particles of ore, com- 
 prising a support for said particles arranged to move in contact with 
 a body of liquid, said support passing through the surface of the 
 liquid in such direction as to carry the particles there through and 
 to cause them to roll back to the surface of the liquid. No. 865,260. 
 
 821 Apparatus for Concentrating Ores. Alexander S. Elmore, Lon- 
 don, England, Assignor to the Ore Separation Company (1905) Lim- 
 ited, London, England. Apparatus for the treatment of ores with 
 oil, comprising a mixing tank, a mixing device for intimately mix- 
 ing a pulp of the ore with oil in the mixing tank, and a floating 
 sea of oil inclosed by a ring for excluding the air from the said 
 tank during the mixing process. No. 865,334. 
 
 822 Apparatus for Separating the Metallic Particles of Ores from 
 the Rocky Constituents Thereof. Dudley Hiram Norris, of New 
 York, N. Y. An apparatus comprising a receptacle having its upper 
 end open to the atmosphere and adapted to receive a flowing mix- 
 ture of pulverized ore and water, means for introducing a stream 
 of water containing air in solution into the mixture in said receptacle 
 to cause infinitesimally small nascent bubbles of air to form in said 
 mixture and rise to the surface thereof to collect the metallic par- 
 ticles of the ore together, a member arranged at the upper end 
 of said receptable to receive the metallic particles of the ore, and 
 a discharge pipe at the lower end of the receptacle out of which 
 the water and the rocky particles of the ore pass. No. 873,586. 
 
 823 Separation of Metalliferous Minerals from Gangue. Henry Liv- 
 ingstone Sulman, Hugh Fitzalis Kirkpatrick-Picard, and John Bal- 
 lot, of London, England, The procoss of treating ores to- sepa- 
 
MISSOURI SCHOOL OF MINES. 75 
 
 rate metalliferous matter from gangue which consists in mixing 
 the powdered mineral with water to form a freely flowing pulp, agi- 
 tated by the mineral pulp with a small quantity of oil sufficient only 
 to impart a thin coating of oil to the metalliferous particles, dis- 
 tributing the mixture in the form of a thin sheet of flowing liquid, 
 causing the immersed particles to be exposed to the air and there- 
 after to meet the surface of the liquid, collecting the floating oiled 
 metalliferous particles and collecting the gangue which sinks. No. 
 879,985. 
 
 824 Separation of Metals from Their Ores. Jacob D. Wolf, of Lon- 
 don, England. The combination with a traveling belt, of means for 
 coating one face of same with a metal selective substance, means 
 for roughening said coating, said roughened coating adapted to re- 
 ceive wet ore pulp, and means for relieving said belt of said se- 
 lective substance and adhering metals. No. 899,149. 
 
 825 Process for Separating Metals from Their Ores. Jacob David 
 Wolf, of London, England. A method of separating metals from 
 their ores which consists in forming a pulp; passing said pulp con- 
 taining the metals over an oily adhesive substance; and in abrading 
 the surface of said substance by drawing apart the body of the 
 same, and thereby causing some of the mineral particles to adhere 
 thereto. No. 899,478. 
 
 826 Ore-Concentrator. Henry Livingstone Sulman and Evan Aspray 
 Sulman, of London, England, assignors to Minerals Separation, Lim- 
 ited, of London, England. In an apparatus for concentrating ores 
 the combination of a fixed surface, means for feeding powdered ore 
 over the surface, means for continuously feeding a thin stream of 
 liquid over the surface, a movable body having a flexible squeegee 
 edge in contact with the surface sufficiently flexible to pass over 
 the ore while exerting sufficient pressure on the surface to remove 
 the film o water therefrom, means for sweeping the body over the 
 surface in a direction at right angles to the direction of flow of 
 the water to cause the ore to be< alternately exposed to the air and 
 to the edge of the liquid. No. 902,018. 
 
 827 Apparatus for Concentrating Ores. Walter Murray Sanders, of 
 Marion, Kentucky. Apparatus for concentrating ore by flotation, 
 comprising a tank having means for introducing ore and solution 
 below the normal liquid surface, a central discharge gate for tail- 
 ings, a substantially central overflow for concentrate,, and means 
 for imparting a whirling motion to the liquid in the tank. No. 
 911,077. 
 
 828 Apparatus for Separating Ores by Flotation. Auguste Joseph 
 Francois De Bavay, of Kew, Victoria, Australia. A method with 
 the combination of a feed pipe, a rotary worm therein, an ore supply 
 connected to each terminal of said pipe, a water supply pipe ar- 
 ranged parallel and adjacent to said feed pipe, a plurality of inclined 
 chutes, distributing means extending transversely of each chute, a 
 liquid containing receptacle at the lower end of each chute, pro- 
 vided at one side with an adjustable overflow lip and inclined gutter 
 for receiving and conveying the particles capable of flotation, an end- 
 
76 MISSOURI SCHOOL OF MINES. 
 
 less traveling belt in each of said receptacles having one end sub- 
 merged therein and adapted to convey the heavier constituents from 
 one trough to the succeeding inclined chute, spray pipes adapted 1 to 
 deliver water upon the belts after they have emerged from said 
 receptacles, and operating means common to said distributing 
 means and said endless traveling belts. No. 912,783. 
 
 829 Ore Separating Process. Marcus Ruthenburg, of Lockport, 
 New York. A process of separating ore or concentrate particles of 
 different specific gravity, which cannot be wetted in water, which 
 consists in surrounding the same with a non-metallic liquid capable 
 of wetting the surfaces of said particles so that they are separated 
 by gravity without flotation in said liquid. No. 933,491. 
 
 830 Process of Treating Ores. Alfred A. Lockwood and Marcus 
 R. A. Samuel, London, England. The process of treating ores, 
 which consists in mixing an ore with a magnetic substance and an 
 oily liquid adapted to cause the magnetic substance to adhere 
 to some constituent part of the ore in preference to the others, 
 and then magnetically separating the mixture. No. 933,717. 
 
 831 Roasting Separation Process. Henry Azor Wentworth, of, New- 
 ton, Massachusetts, assignor to Huff Electrostatic Separator Com- 
 pany, of Boston, Massachusetts, a corporation of Maine. The pro- 
 cess of separating zinc sulfid from other sulfids associated therewith 
 which consists in superficially changing sulfids other than zinc sul- 
 fids by subjecting the mass to heat, and thereafter separating by 
 flotation, the heat-affected particles from those unaffected. No. 
 938,732. 
 
 832 Apparatus for Ore Concentration. Theodore Jesse Hoover, of 
 London, England, assignor to Minerals Separation Limited, of Lon- 
 don, England. In an apparatus for concentrating ores by gaseous 
 flotation of certain mineral particles in liquid, the combination of, 
 an agitation vessel, a spitzkasten contiguous thereto, said vessel 
 and spitzkasten adapted to contain circuit liquid, means for agi- 
 tating the contents of the agitation vessel so as to beat air into the 
 liquid, and a wall between the agitation vessel and the spitzkasten 
 having a wide communication orifice below the level of the liquid 
 in both vessels, said agitation vessel adapted to discharge substan- 
 tially directly into the spitzkasten. No. 953,746. 
 
 833 Concentration of Ores. Henry Livingstone Sulman, of London, 
 England, assignor to Minerals Separation Limited, of London, 
 England. A process of concentrating ores which consists in mixing 
 the powdered ore with slightly acidified water containing in solution 
 a minute quantity of an alcohol, agitating the mixture, bringing the 
 ore particles into contact with air so as to cause the metallic sulfids 
 to float and separating the floating particles. No. 955,012. 
 
 834 Process of Treating Ores. Alfred A. Lockwood and Marcus R. 
 A. Samuel, London, England, assignors to the Murex Syndicate 
 Limited, London, England. A process of treating sulfid ores which 
 consists in crushing ores composed of friable sulfids in which the 
 commingled grains or particles are bound together by a sulfid, 
 agitating such crushed ores with an alkaline silicate solution to 
 
MISSOURI SCHOOL OF MINES. 77 
 
 weaken the bonds between the grains of the commingled sulfids on 
 cleavage lines so that they may be advantageously separated with- 
 out excessive grinding and concomitant sliming and then subject- 
 ing said particles to separation and separate collection. No. 956,381. 
 
 835 Process of Treating Ores and Carboniferous Earths. Alfred A. 
 Lockwood, of London, England. In a process for treating ores, agi- 
 tating the ore with a mixture comprising water, an insoluble me- 
 tallic compound containing oxygen and an oily liquid which has been 
 so treated that it contains a minute quantity of a metallic compound 
 insoluble in water for the purpose of preventing the washing out of 
 said insoluble metallic compound, and then separating the oiled 
 particles from the unoiled particles by a flotation process. No. 
 956,773. 
 
 836 Process for Treating Metallic Slimes. James Dunstone, of Dol- 
 lar Bay, Michigan. The process consisting in agitating copper 
 slimes in the presence of an emulsion of oil, an aqueous solution 
 of sodium nitrate, and an acid adapted to decompose the sodium 
 nitrate, and collecting the portion floated. No. 956,800. 
 
 837 Apparatus for Electrical Separation. Henry Azor Wentworth, 
 Newton, Mass., assignor to Huff Electrostatic Separator Company, 
 Boston, Mass., a Corporation of Maino. In an electrical separator, 
 a conveyor electrode, means to deliver comminuted material thereto, 
 an adjacent spray discharging electrode, and an insulated electro- 
 conductive shield, so disposed in relation to the two electrodes as 
 to intercept further lodgment of the spray upon material affected 
 by the spray earlier in the conveyance of the material, and so as 
 to produce, in opposition to the surface of tho conveyor electrode, 
 a material-repelling static field, and means to collect separately the 
 separated material. No. 960,470. 
 
 838 Ore Concentration. Henry Livingstone Sulman, Henry Howard 
 Greenway, and Arthur Howard Higgins, of London, England. A 
 process of concentrating ores which consists in mixing the powdered 
 ore with water containing in solution a small quantity of a mineral- 
 frothing agent, agitating the mixture to form a froth and separating 
 the froth. No. 962,678. 
 
 839 Method of Separating Minerals. Alexander S. Ramage, of De- 
 troit, Michigan, assignor to Chemical Development Co., of Buffalo, 
 New York, a corporation of Colorado. The method of treating ores 
 containing a plurality of mineral components, which consists in 
 immersing the ore in a suitable solution, separately floating said 
 mineral components by progressively raising the temperature of 
 the solution, and removing at each rise of temperature the product 
 separated during such rise. No. 967,671, 
 
 840 Process of Separation. Henry Azor Wentworth, of Lynn, Massa- 
 chusetts, assignor to Huff Electrostatic Separator Company, of Bos- 
 ton, Massachusetts, a corporation of Maine. The process of sep- 
 arating ingredients of comminuted material, which consists in as- 
 sociating with the material a substance chemically reactive upon 
 particles thereof, thereby producing upon the particles affected by 
 
78 MISSOURI SCHOOL OF MIXES. 
 
 the reactive substance superficial coatings of a compound different 
 from the original substance of the particles in respect to film-tension 
 of a liquid, and thereupon separating the differentiated particles by 
 film-tension of said liquid. No. 970,002. 
 
 841 Apparatus for Separating Minerals from Their Ores. Sajnuel 
 K. Behrend, of Denver, Colorado. The combination with a separat- 
 ing tank adapted to contain liquid, and a pipe which discharges 
 radially at the center of the tank and at the surface of the liquid 
 therein, of a barrier located between the water inlet and overflow, 
 said barrier having members in the path of material floating 
 thereon, and a screen located above the tank between said means 
 and the water outlet, for sifting the material to be treated upon 
 the surface of the liquid in the tank. No. 973,467. 
 
 842 Apparatus for Ore Concentration. Theodore Jesse Hoover, Lon- 
 don, England, assignor to the Minerals Separation Limited, London, 
 England. Apparatus for concentrating ores by gaseous flotation of 
 certain mineral particles in liquid comprising in combination a 
 mixing vessel, an agitator in the mixing vessel, a spitzkasten at the 
 outlet of the mixing vessel, a secondary mixing vessel, a centrifu- 
 gally acting agitator in said secondary mixing vessel and a con- 
 necting conduit between the tailings outlet of the spitzkasten and 
 the zone of the suction influence of the centrifugally acting agita- 
 tor of said secondary mixing vessel. No. 979,857. 
 
 843 Process of Concentrating Ores. Walter Murray Sanders, Ma- 
 rion, Ky. The process of concentrating sulfid ores, which consists 
 in first concentrating the ore to effect a substantially complete sepa- 
 ration of calcite, and thereafter subjecting the purified ore to fur- 
 ther concentration by flotation in a solution adapted to react upon 
 the ore to produce bubbles and capable of reacting upon calcite. 
 No. 988,737. 
 
 844 Magnetic Preparation of Ores. Alfred Arthur Lockwood, Lon- 
 don, England, assignor to Murex Magnetic Company, Limited, Lon- 
 don, England. In the magnetic preparation of an ore, the process 
 which consists in treating the ore with a magnetic substance, an 
 oily liquid, and a solution of a sulfid of an alkali metal and mag- 
 netically separating the mixture. No. 996,491. 
 
 845 Liquid Ore Separation. Francis I. du Pont, of Wilmington, 
 Delaware. The process of separating solids of different specific 
 gravities, consisting in liquefying anhydrous antimony bromid, pass- 
 ing the mixture to te separated therethrough and separately dis- 
 charging the portions which float and those which sink. No. 
 1,014,624. 
 
 846 Apparatus for the W T et Dressing of Sulfid Ores. Benjamin 
 Sedgely Smith, of Manly, near Sydney, New South Wales, Australia. 
 An apparatus for concentrating and classifying sulfid ores, the com- 
 bination of conducting means for a film of water, means for dis- 
 tributing ores on the surface of the film of water, an inclined table 
 provided with an aperture therein, a valve controlled receptacle 
 open to and in water tight engagement with the said aperture in 
 
MISSOURI SCHOOL OF MINES. 79 
 
 said table, and a drowning box interposed between said conducting 
 means and said table to conduct the ore carrying film of water 
 from the former to the latter, to thoroughly submerge the ore 
 therein whereby it sinks into said receptacle upon reaching the 
 sam. No. 1,014,977. 
 
 847 Process of Treating and Subsequently Separating Sulfid Ores, 
 etc. Edward James Horwood, of Broken Hill, New South Wales, 
 Australia. The process of separating zinc sulfid from other sulfids 
 associated therewith which consists in superficially changing sul- 
 fids other than zinc sulfids by subjecting the mass to heat, and 
 thereafter separating by flotation, the heat-affected particles from 
 those unaffected. No. 1,020,353. 
 
 848 Art of Concentration of Mineral Substances. James M. Hyde, 
 of Basin, Montana. A continuous process of concentrating the 
 valuable constituents from ore pulps, comprising the addition to 
 the pulp of an acid precipitant adapted to react upon the ore, 
 allowing a time interval to elapse prior to subjecting it to the sep- 
 aration treatment, then subjecting the pulp to a separation treat- 
 ment comprising the steps of adding a non-metallic material which 
 will preferentially coat the valuable particles of the ore and sep- 
 arating said coated particles as a concentrate. No. 1,022,085. 
 
 849 Apparatus for Separating Particles of Rubber from Materials 
 with which they are Commingled. William Sullivan Blaine, of Tor- 
 reon, Mexico, assignor to Intercontinental Rubber Company, of New 
 York, N. Y., a corporation of New Jersey. Apparatus for separating 
 particles of rubber from materials with which they are commingled, 
 said apparatus comprising a, flotation tank, ~a concentrating table 
 communicating with said tank at one end thereof, and an overflow for 
 the flotation tank, so arranged as to maintain a shallow covering of 
 water upon the concentration table. No. 1,032,732. 
 
 850 Method of Separating Particles of Rubber from Materials with 
 which they are Commingled. William Sullivan Blaine, of Tor- 
 reon, Mexico, assignor to Intercontinental Rubber Company, of New 
 York, N. Y., a corporation of New Jersey. The method of separat- 
 ing particles of rubber from materials with which they are com- 
 mingled, which consists in separating the rubber particles by flota- 
 tion in a body of water, and 1 withdrawing the heavier residues or 
 sinkers into an auxiliary substantially quiescent body of water and 
 under such back pressure as will substantially prevent re-entrance 
 into the sinkers, of rubber particles that have been released. No. 
 1,032,733. 
 
 851 Process of Separating Ores. Alfred Arthur Lockwood, of Lon- 
 don, England, assignor to Murex Magnetic Company, Limited, of 
 London, England. A process which consists in treating the ore 
 with an oily liquid, water and with a silicate of an alkali metal to 
 modify the behavior of the oil toward the constituents in the ore 
 and separating the oiled constituents from the unoiled constituents. 
 No. 1,043,850. 
 
80 MISSOURI SCHOOL OF MIXES. 
 
 852 Process of Separating Ores, etc. Alfred Arthur Lockwood, of 
 London, England, assignor to Murex Magnetic Company, Limited, of 
 London, England. A process which consists in treating an oxidized 
 ore with an oily liquid and water; aiding the oiling of the metal- 
 liferous contents of the ore by treatment with a carbonate of an 
 alkaline metal and separating the oiled constituents from the un- 
 oiled constituents. No. 1,043,851. 
 
 853 Separation of Metallic Sulfids from Sulfid Ores. Thomas John 
 Greenway, of Armadale, near Melbourne, Victoria, Australia, as- 
 signor to Potter's Sulphide Ore Treatment Limited, of Melbourne, 
 Australia, a corporation of Victoria, Australia. A process for the 
 separation of metallic sulfids from sulfid ores which consists of first 
 intimately mixing finely divided particles of the ore with a small 
 proportion of viscous oil; secondly, feeding the oiled ore into a 
 heated acidulated solution; thirdly, skimming or floating off the 
 coherent buoyant scum of gasified oiled sulfid particles, and sep- 
 arately withdrawing the unoiled sunken gangue particles. No. 
 1,045,970. 
 
 854 Ore Float-Separator. Robert Henry Jeffrey, of Gabriel, Mexico. 
 An ore-float separator containing a body of liquid, means giving the 
 effective surface of the liquid conical form, a centrally disposed 
 liquid supply delivering the liquid radially outward in all directions, 
 an ore distributer above the liquid and adjustable to and from the 
 liquid surface, and means for imparting rotary motion to the ore 
 distributer. No. 1,052,061. 
 
 855 Process for Treating Ores. Carl Schick, of Siegen, Germany. 
 A process of treating ore slimes which consists in mixing the slimes 
 with a chlorin derivative of benzol, agitating the mixture, subjecting 
 the mixture to an acid bath, and permitting the settlement of the 
 mixture. No. 1,055,495. 
 
 856 Apparatus for Separating Minerals. Alexander Herbert Smith, 
 of Glasgow, Scotland. The combination of a spitzkasten having an 
 open top, a concentrate lip and a straight side wall having a slot 
 lower than said lip and remote from the bottom of the spitzkasten; 
 a pocket surrounding said slot and provided with a lip higher than 
 said slot and lower than the concentrate lip; and means for conduct- 
 ing mineral feed into the spitzkasten. No. 1,056,952. 
 
 857 Ore Mixing and Separating Apparatus. Alexander H. Smith, of 
 Glasgow, Scotland. An ore mixing and separating apparatus, the 
 combination of a mixer casing having a closed sloping top; a pro- 
 peller fan mounted in said casing; feed means for a material to 
 be separated and a frothing reagent; a decanting separator; and 
 a sloping conduit of greater length than depth communicating 
 with the upper part of the casing adjacent to the uppermost part 
 of said sloping top and discharging beneath the water level of 
 the decanting separator. No. 1,058,111. 
 
 858 Apparatus for Ore Concentration. James Hebbard, of Broken 
 Hill, New South Wales, Australia, assignor to Minerals Separation 
 Limited, of London, England. Apparatus for concentrating ores by 
 
MISSOURI SCHOOL OF MINKS. 81 
 
 gaseous flotation of certain mineral particles in liquid, comprising 
 in combination two adjacent mixing vessels, each containing a 
 rotary agitator and a spitzkasten placed contiguous thereto having 
 a high level orifice leading from the first mixing vessel to the spitz- 
 kasten, and a low level orifice leading from the spitzkasten to the 
 bottom of the second mixing vessel. No. 1,064,209. 
 
 859 Method of Gravity Liquid Separation of Solids. Francis I. du 
 Pont, of Wilmington, Delaware. A process of gravity liquid sep- 
 aration of solids, which consists in immersing the solids to be 
 separated in a volatile gravity liquid, separately removing from 
 the bath the separated constituents of different specific gravity, 
 volatilizing the gravity liquid carried off by each constituent, con- 
 densing the same and returning the same to the separating bath 
 and maintaining the circuit of the liquid carried off from the bath 
 by the constituents from its departure from the bath until return 
 to the bath out of connection with the air. No. 1,064,459. 
 
 860 Ore Concentration. Henry Howard Greenway, of Melbourne, 
 Victoria, and Henry Lavers, of Broken Hill, New South Wales, 
 Australia, assignors to Minerals Separation Limited, of London, 
 England. A process of concentrating ores, which consists in mix- 
 ing finely divided ore with water containing a froth-producing 
 e.ssential oil, agitating the mixture to form a froth, and separating 
 the froth. No. 1,064,723. 
 
 861 Apparatus for Gravity Liquid Separation of Solids. Francis I. 
 du Pont, of Wilmington, Dela. An apparatus for gravity liquid sep- 
 aration of solids, in combination, a revolving cylinder adapted to 
 contain the separating liquid, conical ends projecting from said 
 cylinder, an inner peripheral continuous spiral blade in said cylin- 
 der, a spiral blade formed of staggered sections in one conical 
 section, and a spiral blade formed in part of perforated sections, 
 and in part of staggered sections in the other conical section. No. 
 1,067,410. 
 
 862 Ore Concentration. Edward Hoit Nutter, of Berkeley, California, 
 and Henry Lavers, of Broken Hill, New South Wales, Australia, 
 assignors to Minerals Separation Limited, of London, England. A 
 process for concentrating ores which consists in treating the 
 crushed ore by a flotation process two or more times under dif- 
 ferent conditions to obtain froths or scums having the constituents 
 of each in certain ratios of size, and thereafter subjecting the pow- 
 dered mixture contained in each froth to a classifying step to sep- 
 arate the constituents. No. 1,067,485. 
 
 863 Ore-Concentrator. Henry Ellsworth Wood, Denver, Colo. The 
 combination with an inclined vibrating ore concentrating table, of 
 a water supply or feed box for maintaining a stream of water 
 across the table, an ore feeding device adapted to deposit the ore 
 in a finely divided state upon the surface of the stream near its 
 source, and an outlet gate at the edge of the table opposite the 
 feeding device, the table being constructed with an area devoid 
 
82 MISSOURI SCHOOL OF MINKS. 
 
 of riffles adjacent the water supply box, and with the riffles in 
 the direct path of the stream modified to reduce disturbance of 
 the surface conditions of the water flowing over them. No. 1,071,850. 
 
 864 Process for the Treatment and Separation of Complex Sulfid 
 Ores. Tormod Reinert Forland, Broken Hill, New South Wales, 
 Australia. A method for chloridizing sulfid ores, of zinc, lead, 
 iron, copper, nickel, arsenic, silver and the like, which comprises 
 treating said ore with chlorin gas, at a temperature at which said 
 metals, with the exception of silver, are converted into chlorids, 
 and certain of said chlorids are volatilized, and chlorid of sulphur 
 is formed and volatilized; passing said volatiUzed chlorids, to- 
 gether with any remaining chlorin and chlorid of sulphur, and 
 other gases into a contact with a further amount of said ore, at a 
 temperature at which the chlorid of sulphur will attack said metal 
 sulfids, and form chlorids of said metals except silver, and free 
 sulphur, and at which temperature certainly only of said chlorids 
 are volatile. No. 1,078,779. 
 
 865 Ore Concentration. George Albert Chapman and Stanley 
 Tucker, of London, England, assignors to Minerals Separation Lim- 
 ited, of London, England. A process for concentrating ores, which 
 consists in subjecting to agitation and to the action of a selective 
 agent a pulp of an ore containing a carbonate, in the presence of 
 a bisulfate of an alkali metal, and separating the selected portion 
 of the ore. No. 1,079,107. 
 
 866 Apparatus for Washing Ore. Hermann Alexander Brackelsberg, 
 of Hagen, Germany. In a float separator for minerals, a plurality 
 of receptacles adapted to overflow into one another, the overflow 
 walls being at progressively lower levels, and each overhanging 
 the surface of liquid in the next receptacle at an angle adapted 
 to cause a film of liquid to flow along the overhanging surface 
 of said wall, and means for gently feeding the material and liquid 
 across the series of receptacles. No. 1,080,886. 
 
 867 Ore-Separator. Charles Henry Brown, Magdalena, New Mex- 
 ico, assignor to the Sherwin-Williams Company, Cleveland, Ohio, a 
 Corporation of Ohio. An apparatus consisting of a combination 
 of a liquid tank; a plurality of spaced rolls in the tank disposed 
 alternately above and below the designed level of the liquid, the 
 rolls below such level having a plurality of spaced peripheral ribs; 
 a movable conveyor extending over the rolls above such level and 
 under the rolls below such level; a device adjacent an end roll for 
 feeding material to the conveyer in the direction of its movement; 
 a plurality of spreaders respectively disposed transversely of and 
 above the conveyer adjacent the several rolls disposed above the 
 liquid level; and means for transversely reciprocating the spread- 
 ers. No. 1,081,360. 
 
 868 Apparatus for Ore Concentration. Walter Broadbridge and Al- 
 len Crawford Howard, London, England, assignors to Minerals 
 Separation Limited, London, England. Apparatus for carrying out 
 the agitation-froth process of ore concentration comprising in com- 
 
MISSOURI SCHOOL OF MINES. 83 
 
 bination a series of agitating and aerating vessels, a series of 
 spitzkastens contiguous thereto and communicating with a plural- 
 ity of the said vessels at various points, and partitions between 
 the spitzkastens which do not extend up to the liquid level, so as to 
 leave uninterrupted surface for the formation of the froth. No. 
 1,084,196. 
 
 869 Ore-Concentrator. Henry Ellsworth Wood, Denver, Colorado. 
 Apparatus consisting of the combination with a settling tank, of 
 a rotating drum or roller submerged to near its top and having a 
 longitudinally corrugated surface, the corrugations being of such 
 form as to carry a continuous surface film and means for depos- 
 iting in a finely comminuted state upon the exposed portion of the 
 drum, the ore to be concentrated. No. 1,088,050. 
 
 870 Method and Apparatus for Ore Concentration. Howard Hoyt 
 Nutter, New York, N. Y., and Theodore Jesse Hoover, London, Eng., 
 Assignors to Minerals Separation Limited, London, England. A 
 method of concentrating ores by the formation of a mineral-bear- 
 ing froth which consists in causing the froth as it is formed to 
 pass over a lip below the level of the free air surface, causing the 
 body of the pulp to pass onward to further treatment without pass- 
 ing over said lip, and causing the more permanent froth of the 
 froth thus separated to pass over a second lip. No. 1,093,463. 
 
 871 Process for Recovering Metalliferous Constituents of Ores. 
 Joseph T. Terry, Jr., San Francisco, California. A process which 
 consists in the subjection of metalliferous particles of ores existing 
 as carbonates, oxides, chlorids and sulphates, to the action of a 
 hydrogen-sulfid gas, then subjecting the resulting product to par- 
 tial vacuum, then agitation in the presence of an oil-film-forming 
 substance, and recovering the oil-film-forming substance, and re- 
 covering the oil-coated particles by flotation. No. 1,094,760. 
 
 872 Concentration of Ores. Henry Howard Greenway, Melbourne, 
 Victoria, Australia, Assignor to Minerals Separation Limited, Lon- 
 don, England. A process of concentrating ores which consists in 
 mixing a powdered ore with neutral water containing in solution 
 a minute quantity of an aromatic hydroxy compound, agitating the 
 mixture in the cold to form a froth and separating the froth. No. 
 1,099,699. 
 
 873 Process for the Separation of Metallic Sulfids from Gangue and 
 Apparatus Therefor. Leslie Bradford, Broken Hill, New South 
 Wales, Australia, Assignor, by Mesne Assignments, to Minerals 
 Separation Limited, London, England. A process of concentrating 
 ores, which consists in mixing the ore with water to form a flowing 
 pulp, adding to the pulp sufficient acid to bring about the evolu- 
 tion of gas by chemical action of the acid, subjecting the pulp and 
 evolved gas therein to violent agitation, and then flowing the agi- 
 tated pulp away from the place of agitation and separating the 
 floating material. No. 1,101,506. 
 
 874 Ore Concentration. Henry Howard Greenway, Clare, South 
 Australia, and Alfred Henry Piper Lowry, Prahran, Victoria, Aus- 
 
84 MISSOURI SCHOOL OF MINES. 
 
 tralia. A process of concentrating metalliferous ores, which con- 
 sists in subjecting the ore to the action of a chromium salt and to 
 flotation separation whereby products are obtained relatively high 
 in certain values, and other products are obtained relatively high 
 in other values. No. 1,102,738. 
 
 875 Ore Concentration. George Albert Chapman and Stanley 
 Tucker, London, England, Assignors to Minerals Separation Lim- 
 ited, London. A process for concentrating ores, which consists in 
 first agitating a quantity of water with a modifying agent out of 
 contact with the, ore so as to form an air emulsion, and thereafter 
 adding to the water the ore to be treated and agitating the same 
 therewith so as to form a froth and separating the froth. No. 
 1,102,873. 
 
 876 Ore Concentration. George A. Chapman, London, England, As- 
 signor to Minerals Separation Limited, London, England, a Cor- 
 poration of England. A process for concentrating ores, which con- 
 sists in grinding the ore with water, in the presence of an agent 
 for modifying the water, so that the agent modifies the physical 
 characteristics of the water, and separating the floating mineral. 
 No. 1,102,874. 
 
 877 Ore-Concentrating Apparatus. John M. Callow, Salt Lake City, 
 Utah, Assignor to Metals Recovery Company, Augusta, Maine, a 
 corporation of Maine. An ore concentrating apparatus having a 
 solution containing tank and a porous body therein through which 
 fine streams of air under pressure are admitted into the solution 
 from below, a means operating in proximity to the upper surface 
 of said body for maintaining the heavier constituents of the solu- 
 tion in suspension to thereby prevent the blanketing of the air 
 outlets of said porous body. No. 1,104,755. 
 
 878 Apparatus for Liquid Separation of Solids. Francis I. du Pont, 
 Wilmington, Delaware, Assignor to International Haloid Company, a 
 Corporation of Delaware. The combination with a tank adapted to 
 hold the separating liquid having an outlet from which the sepa- 
 rated constituent is discharged, of a conveyer, a conduit through 
 which the conveyer travels, means to heat the conduit, a condenser, 
 a pipe leading to the condenser from the conduit at a relatively hot 
 part of the latter, a vapor discharge from the condenser and a pipe 
 leading from the vapor discharge to the conduit at a relatively 
 cool part of the latter, and means to deliver material from the 
 tank outlet to the conveyer, said tank, conduit and condenser being 
 closed against direct connection with the external atmosphere. No. 
 1,106,195. 
 
 879 Separation of Zinc-Blende and other Metalliferous Constituents 
 from Ore Concentrates and Slimes by Flotation or Granulation. 
 Edward James Horwood, Broken Hill, New South Wales, Australia. 
 A process of separating sulfids, the method which comprises extract- 
 ing water soluble substances from a material comprising a plu- 
 rality of such sulfids, thereafter submitting to a heating operation 
 to deaden certain of such sulfids and finally separating the sulfids 
 by a selective wetting operation. No. 1,108,440. 
 
MISSOURI SCHOOL OF MINES. 85 
 
 880 Method of Concentrating Ores. William Sydney Stevens, Mag- 
 dalena, New Mexico, Assignor, by Mesne Assignments, to The Ozark 
 Smelting and Mining Company, Cleveland, Ohio, a Corporation of 
 Ohio. The process of concentrating ore, which consists in mixing 
 together at a temperature of not less than 60C. crushed ore, suffi- 
 cient water to form, a flowing pulp, sulfuric acid, and a mineral 
 oil in amount only sufficient to preferentially coat the desired 
 sulfids particles of the ore; and thereafter presenting the pulp to the 
 air and then to the surface of a liquid to cause a flotation of the 
 oiled sulfid particles by surface tension. No. 1,116,642. 
 
 881 Ore-Concentrating Apparatus. John M. Callow, Salt Lake City, 
 Utah, Assignor to Metals Recovery Company, Augusta, Maine, a 
 Corporation of Maine. An ore concentrating apparatus having a so- 
 lution-containing tank and a porous medium therein through which 
 fine streams of air under pressure are admitted into the solution 
 from below, a means operating in proximity to the upper surface 
 of said medium for maintaining the heavier constituents of the so- 
 lution in suspension to thereby prevent the blanketing of the air 
 outlets of said porous medium, said means including a rotary mem- 
 ber adapted to beat into the solution the air diffused by the porous 
 medium, and means for rotating said member at a high speed. No. 
 1,124,853. 
 
 882 Ore Separatory Apparatus. John M. Callow and David J. Kelly, 
 Salt Lake City, Utah, Assignors to Metals Recovery Company, Au- 
 gusta, Maine, a Corporation of Maine. An apparatus of the com- 
 bination with a tank adapted to contain a mixture of powdered 
 ores and water and a frothable agent, of a hollow rotary member 
 operable in the tank and adapted to receive a gaseous fluid under 
 pressure, said member being sufficiently porous to permit the pas- 
 sage of the gaseous fluid therethrough but not the water and pulp. 
 No. 1,124,855. 
 
 883 Ore-Flotation Apparatus. John M. Callow, Salt Lake City, Utah, 
 Assignor to Metals Recovery Company, Augusta, Maine, a Corpora- 
 tion of Maine. An apparatus having a pulp-containing tanK and a 
 porous body therein through which streams of gaseous fluid under 
 pressure are admitted into the solution from below, said porous 
 body permitting the passage of the gaseous fluid but not pulp and 
 water, and a reciprocable carrier mounted in the tank and having 
 elements operating in the proximity to the upper surface of said 
 body for maintaining the coarser constituents of the solution in sus- 
 pension to thereby prevent the blanketing of the outlets of said 
 porous body. No. 1,124,856. 
 
 884 Process of Concentrating Ores. John M. Callow, Salt Lake City, 
 Utah, Assignor to Metals Recovery Company, Augusta, Maine, a 
 Corporation of Maine. Apparatus for separating the metalliferous 
 from the non-metalliferous ingredients of an ore mass, the combi- 
 nation of a pulp receptacle, means for forcing substantially uni- 
 formly distributed bubbles to the surface of said mass, and independ- 
 ent means for exhausting said bubbles from the upper surface of the 
 pulp. No. 1,125,897. 
 
86 MISSOURI SCHOOL OF MINES. 
 
 885 Process of Treating Ores. Joseph W. Emerson, Salida, Colo- 
 rado. The process of removing blende from blende-containing con- 
 centrates which comprises submerging a body of such concentrates 
 in a relatively deep body of an acid solution, mechanically engag- 
 ing said particles as soon as they rise above the general plane of 
 sucn body of concentrates and immediately removing them from 
 the acid solution. No. 1,126,965. 
 
 886 Apparatus for Separating Minerals By Flotation. Bernard Mac- 
 Donald, Los Angeles, California. An apparatus for separating min- 
 erals by flotation comprising a receptacle, a launder adjacent to 
 the receptacle into which the material passes from the receptacle, 
 a vertically disposed transfer-pipe within the receptacle having a 
 lower open intake end and an upper discharge end, a pipe entering 
 the lower open end of the transfer-pipe, means for supplying com- 
 pressed air to said last mentioned pipe and means for supplying oil 
 to said last mentioned pipe. No. 1,134,690. 
 
 887 Flotation-Machine. Charles E. Rork, Douglas, Arizona. A flo- 
 tation separator including a settling tank provided at its sides with 
 overflow lips, an agitation chamber extending longitudinally and 
 centrally of the tank being partially immersed therein and divided 
 into a plurality of transverse compartments, each compartment be- 
 ing provided at one side with an inlet opening near its bottom 
 and at its other side with an outlet opening near its top, such open- 
 ings being reversely arranged in adjacent compartments, parti- 
 tions in the settling tank forming chambers which communicate 
 with one inlet and one outlet opening, and an agitator mounted in 
 each compartment of the agitation chamber. No. 1,136,485. 
 
 888 Apparatus for the Wet Dressing of Sulfid Ores. Benjamin 
 Sedgely Smith, Sydney, New South Wales, Australia. In combi- 
 nation, a surface tension separating table provided with means for 
 flowing liquid therethrough, a screen thereover adapted to deliver 
 a predetermined size of material to the table, a distributing screen 
 close to and parallel with the surface of the liquid on the table, 
 interposed in the path of material dropping from the primary screen 
 and adapted to break the momentum thereof. No. 1,136,622. 
 
 889 Flotation of Minerals. Raymond F. Bacon, Pittsburgh, Penn- 
 sylvania, Assignor to Metals Research Company, New York, N. Y., 
 a Corporation of Maine. The method of effecting the separation 
 of oxidized ores from associated gangue, which consists in subject- 
 ing the mixture, in a finely divided condition, to the action of a 
 soluble sulfid, thereby effecting a conversion of the oxidized ore in- 
 to sulfids, and then converting the hydrogen sulfid present into con- 
 stituents innocuous to flotation, and finally subjecting the mixture 
 to flotation. No. 1,140,866. 
 
 890 Flotation of Minerals. Raymond F. Bacon, Pittsburgh, Penn- 
 sylvania, Assignor to Metals Research Company, New York, N. Y., a 
 Corporation of Maine. The method of effecting the separation of oxi- 
 dized ores from associated ganguo, which consists in subjecting the 
 mixture, in a finely divided condition, to the action of a soluble 
 sulfid, thereby effecting a conversion of the oxidized ore into sul- 
 
MISSOURI SCHOOL OF MINES. 87 
 
 fids, and then converting the hydrogen sulfid present into constit- 
 uents innocous to flotation, and finally subjecting the mixture to flo- 
 tation. No. 1,140,866. 
 
 891 Ore-Concentrating Apparatus. John M. Callow, Salt Lake City, 
 Utah, Assignor, by Mesne Assignments, to Metals Recovery Com- 
 pany, a Corporation of Maine. An apparatus consisting of the com- 
 bination of a tank or receptacle adapted to receive ore pulp and 
 a substance having the property of frothing in the presence of a 
 gaseous medium and agitation, a casing within the lower portion 
 of the tank and separated therefrom to form a surrounding space 
 or chamber, a body of porous material within said inner casing and 
 supported above the bottom thereof so as to form a chamber between 
 said porous body and the bottom of the tank, a feed-pipe terminat- 
 ing in the lower portion of the tank above the porous body and 
 adapted to deliver the pulp into the casing above said body, a 
 pipe leading into the chamber below said porous body and adapted 
 to admit a gaseous medium under pressure thereinto, said porous 
 body subdividing the gaseous medium and distributing the same 
 irregularly substantially throughout the entire surface of the pulp, 
 and a discharge means connecting with the space or chamber be- 
 tween the inner casing and the tank and adapted to deliver there- 
 from the heavier material which has settled into said space. No. 
 1,141,377. 
 
 892 Separation of Mixed-Sulfid Ores. Henry Lavers, Surrey Hills, 
 Victoria, Australia, Assignor to Minerals Separation American Syn- 
 dicate (1913) Limited, London, England. A process of concen- 
 trating metallic sulfid ores, which consists in subjecting the ore to 
 the action of a chromium salt in a slightly alkaline solution and to 
 a flotation separation in a heated circuit whereby a flotation product 
 relatively high in certain sulfids and a residue relatively high in 
 other sulfids are obtained. No. 1,142,821. 
 
 893 Process of Separating the Constituents of Rocks. Gunnar Sigge 
 Andreas Appelqvist and Einar Olof Eugen Tyden, Stockholm Swe- 
 den. The process of separating constituents of rocks by the aid 
 of oils which consists in treating the material to be separated in 
 the form of a powder in dry condition with oils gasified by the ap- 
 plication of heat, repeating at will the said treating operation, im- 
 mersing the material thus treated into a liquid, agitating the mass, 
 and allowing the different particles to separate from one another. 
 No. 1,143,797. 
 
 894 Concentration of Minerals by Flotation. Archibald R. Living- 
 ston, Canon City, Colorado, Assignor to the New Jersey Zinc Com- 
 pany, New York, N. Y., a Corporation of New Jersey. The method 
 of separating floatable minerals from material with which they are 
 associated, which consists in feeding the mixture into the body of 
 water, progressively raising it through the surface of the water 
 at an angle greater than its natural angle of repose, meeting the 
 emerging top layer by a downflowing film of water, and floating the 
 top layer thereby into the main body of .water at the surface thereof 
 and collecting the material thereby separated separately from that 
 Which sinks, No. 1,147,633, 
 
88 MISSOURI SCHOOL OF MINES. 
 
 895 Ore Separating Process. Arthur J. Moxham, Wilmington, Del- 
 aware. A process of separating solid constituents of different spe- 
 cific gravities in a heavy liquid, first treating the solids to reduce 
 the specific gravity of each of the solid constituents to the extent 
 required to cause the separating liquid to have the desired specific 
 gravity relative to the specific gravity of each of the solid con- 
 stituents, and then effecting the separation of the solid constituents 
 in such separating liquid. No. 1,151,117. 
 
 896 Apparatus for Ore Concentration. Arthur Howard Higgins and 
 William Warwick Stenning, London, England, assignors to Min- 
 erals Separation, Limited, London, England. Apparatus for con- 
 centrating ores by gaseous flotation of certain mineral particles in 
 liquid, comprising, in combination, a vessel, means for introducing 
 a gas therein at the lower part of the vessel, means for producing 
 a zone of violent agitation and gasification in the lower part of the 
 vessel, a baffle above the agitator for producing a quiescent zone 
 in the upper part of the vessel, the baffle being inclined down- 
 wardly from the inlet side to the outlet side of the vessel, an inlet 
 for the pulp to the vessel below the baffle, means for removing 
 the froth from the upper surface of the liquid, and an outlet for 
 the residues above the baffle. No. 1,155,815. 
 
 897 Apparatus for the Concentration of Ores. Thomas Mackellar 
 Owen, Broken Hill, New South Wales, Australia, assignor to Min- 
 erals Separation American Syndicate (1913), Limited, London, Eng- 
 land. An apparatus for concentrating ores by gaseous flotation 
 of certain mineral particles in liquid, a single upright vessel open 
 at the top comprising both an agitation and a separation vessel, 
 an inlet conduit for ore pulp at the bottom of the vessel, an outlet 
 conduit for tailings near the top of the vessel, a rotatable agitator 
 in the lower part of the vessel, a conduit for air leading into the 
 low.er part of the vessel, vertically elongated baffles immediately 
 above the agitator terminating at a substantial distance below 
 the surface of the liquid in the vessel for producing a baffling zone 
 above the atomizing zone, and a substantially quiescent topmost 
 and separating zone above the baffling zone. No. 1,155,836. 
 
 898 Ore Concentration. Louis Albert Wood, London, England, as- 
 signor to Minerals Separation American Syndicate (1913), Limited, 
 London, England. A process of concentrating ores which consists 
 in subjecting the powdered ore suspended in water free from froth- 
 ing agents to the admission oT gas, forcefully disseminating the 
 gas through the pulp in such a way that the gaseous bubbles 
 preferentially attach themselves to certain mineral particles, and 
 rise toward the surface and discharge their mineral load with the 
 pulp, and catching and removing such discarded mineral below 
 the surface of the liquid. No. 1,155,861. 
 
 899 Slime-Thickener for Dewatering Mine-Tailings. Wilton E. Dar- 
 row, Sutter Creek, California. A device comprising a receptable 
 having a central inlet pipe extending to a point near the bottom 
 thereof, a plurality of openings in the side of said receptacle, an- 
 other receptacle disposed around said first named receptacle, said 
 
MISSOURI SCHOOL OF MINES. 89 
 
 openings communicating with said second named "receptacle, and 
 a plurality of deflectors arranged in said first named receptacle. 
 No. 1,156,276. 
 
 900 Agitator for Ore Treatment. Cyrus Robinson, Mount Vernon, 
 New York, assignor to Metallurgical Engineering Process Cor- 
 poration, a corporation of New York. In an agitator for ore treat- 
 ment, the combination of a receptacle adapted to contain a mix- 
 ture of solvent solution and finely divided ore, a vertical tube 
 mounted in the receptacle and terminating at its lower end above 
 the bottom of the receptacle, an air nozzle at the bottom of the 
 receptacle below and closely adjacent the lower end of the tube, 
 means for delivering air to the nozzle to agitate the mixture in 
 the tube and force it upward therethrough, means supplemental 
 to the receptacle for receiving the mixture from the upper end of 
 the tube, and means for entering the nozzle to cut down the ef- 
 fective cross area thereof. No. 1,156,372. 
 
 901 Process of Extracting Metals from Ores. Robert S. Towne, 
 New York, and Cyrus Robinson, Mount Vernon, New York, as- 
 signors to Metallurgical Engineering & Process Corporation, a cor- 
 poration of New York. A process for effecting the separation of 
 soluble values from a mass, it consisting in subjecting the mass to 
 the action of a solvent solution of comparatively high dissolving 
 efficiency for a comparatively short period of time, positively and 
 actively agitating the mass and the solution during the said period, 
 subjecting the mass to a positive and active dehydration, thereby 
 withdrawing from it a major portion of the solution together with 
 the dissolved values contained therein, subjecting the remaining 
 mass to the action of a similar solvent solution of comparatively 
 low dissolving efficiency for a comparatively long period of time, 
 positively and actively agitating the mass and the solution during 
 the said period, subjecting the mass to a second positive and 
 active dehydration, thereby withdrawing from it a major portion 
 of the second solution together with the dissolved values con- 
 tained therein, and extracting the dissolved values from each of 
 the said withdrawn solutions independently of the other. No. 
 1,156,382. 
 
 902 Separation of Metallic Sulfids from Ores. Thomas Mackellar 
 Owen, Sydney, New South Wales, Australia, assignor to Edward 
 William Culver, Sydney, New South Wales, Australia. In selective 
 or preferential froth flotation separation of metallic sulfids from 
 slimes, a process for augmenting the flotative quality of certain 
 sulfids in relation to certain other sulfids, which consists in adding 
 to and agitating with the pulp a limited proportion of alkaline 
 permanganate. No. 1,157,176. 
 
 903 Separation of Minerals by Flotation. Lewis G. Rowand, 
 Brooklyn, N. Y., assignor to New Jersey Zinc Company, New 
 York, N. Y., a corporation of New Jersey. The method of separat- 
 ing sulfid constituents from ores in which they are contained, 
 which comprises feeding the solid particles of the ore in a finely 
 
90 
 
 MISSOURI SCHOOL OF MINKS. 
 
 divided condition upon a moving layer of an oleaginous liquid hav- 
 ing a selective action for the sulfids of a character to effect flota- 
 tion, progressively feeding said layer with its charge of ore into a 
 flotation liquid at the surface thereof, and floating off and recovering 
 the floating sulfids. No. 1,159,713. 
 
MISSOURI SCHOOL OF MINES. 91 
 
 NAME INDEX TO PATENTS 
 
 (Numbers refer to items and not pages.) 
 
 Allen, A. A 759 
 
 Appelqvist, G. S. A 744, 893 
 
 Bacon, Raymond F 889, 890 
 
 Ballot, J 705-707, 712, 713, 715, 724, 809, 811, 823 
 
 Behrend, Samuel K 841 
 
 Elaine, William S 849, 850 
 
 Brackelsberg, H. A 866 
 
 Bradford, Hezekiah 747 
 
 Bradford, Leslie 873 
 
 Broadbridge, Walter 742, 868 
 
 Broken Hill Proprietary Company, Ltd. 774 
 
 Brown, C. H '. 867 
 
 Brown, C. T 751 
 
 Brumell, Henry Peareth Hawdon 757 
 
 Callow, John M 877, 881-884, 891 
 
 Cattermole, A. E 687, 690, 691, 773, 784, 785, 790 
 
 Chapman, G. A 715, 739, 740, 865, 875, 876 
 
 Chemical Development Company 839 
 
 Crowder, S 678, 753 
 
 Culver, E. W 902 
 
 Darling, J. D 776, 794 
 
 Darrow, W. E 899 
 
 Davis, J. H 758, 805 
 
 Debavay, A. J. F ^ 699, 703, 616, 828 
 
 Delprat, G. D 685, 686, 692, G94, 765, 774, 778 
 
 Dick, F. B 729 
 
 Du Pont, Francis 1 836. 845, 859, 861, 878 
 
 Elmore, A. S 680, 688, 708, 717, 760, 761, 762, 821 
 
 Elmore, F. E 679, 698,704,717, 754, 756, 808 
 
 Emerson, J. W 885 
 
 Everson, C. J 750, 751 
 
 Finley, F. B 791, 806 
 
 Foote, A. D 768 
 
 Forland, T. R 864 
 
 Froment, A 683 
 
 Gale, Denis 755 
 
 Gillies, J. H 700, 786, 787 
 
 Glogner, M. F. R 766 
 
 Good, I. F 769 
 
 Goyder, G. A 689, 775, 788 
 
 Gray, R., Jr 746 
 
 Greenway, H. H 730-732, 838, 860, 872, 874 
 
 Greenway, T. J 853 
 
 Harris, J. H 769 
 
 Haultain, H. E. T 682 
 
 Hebbard, J 741, 858 
 
 Hebron, C. B -. 750, 751 
 
 Higgins, A. H 719, 724, 745, 838, 896 
 
 Hockley, E. A 748 
 
92 MISSOURI SCHOOL OF MINDS. 
 
 Hoover, T. J 725, 727, 832, 842, 870 
 
 Horwood, E. J 721, 878, 879 
 
 Howard, A. C 742, 868 
 
 Huff Electrostatic Separation Company 831, 837, 840 
 
 Hutchinson, M. W 751 
 
 Hyde, J. M 848 
 
 Intercontinental Rubber Company 849, 850 
 
 International Haloid Company 878 
 
 Jamieson, W 770 
 
 Jeffrey, R. H 854 
 
 Jones, A. E 746 
 
 Kelly, D. J 882 
 
 Kendall, Cosmo 780 
 
 Kirby, E. B 803, 812 
 
 Latimer, J. F 814, 815 
 
 Laughton, E 689, 775, 788 
 
 Lavers, Henry 732, 733, 860, 862, 892 
 
 Lindley, C. N 777 
 
 Livingston, A. R 894 
 
 Lockwood, A. A 718, 722, 728, 736-738, 830, 834, 835, 844, 851, 852 
 
 Lowry, A. H. P 874 
 
 MacDonald, Bernard 886 
 
 Macquisten A. P. S 702, 709, 818-820 
 
 Metallurgical Engineering Process Corporation 900, 901 
 
 Metals Recovery Company 877, 881-884, 891 
 
 Metals Research Company : 889, 890 
 
 Minerals Separation Limited 733, 734, 740-742, 745, 811, 826, 832, 833, 
 
 842, 858, 860, 862, 865, 868, 870, 872, 873, 875, 876, 896 
 
 Minerals Separation American Syndicate (1913) Limited 892, 897, 898 
 
 Moxham, A. J 895 
 
 Murex Magnetic Company, Limited 728, 736-738, 834, 844, 851, 852 
 
 Xaillen, E. L. V 767 
 
 New Jersey Zinc Company 894,- 903 
 
 Nibelius, A. W 752 
 
 Xorris, D. H 817, 822 
 
 Nutter, E. H 733-735, 862, 870 
 
 Odling, F. J 770 
 
 Ore Concentration Company (1905), Limited 821 
 
 Orr, H. L 771, 791 
 
 Owen, T. M 897, 902 
 
 The Ozark Smelting & Mining Company 880 
 
 Pettinos, G. F . . . 769 
 
 Picard, H. K 690, 693, 696, 705-707, 712, 713, 71 R. 7?o. 7'>r 726. 785. 
 
 790, 793, 809, 811, 823 
 
 Pohle, E. C 804 
 
 Potter, C. V 681, 782 
 
 Potter's Sulphide Ore Treatment, Limited 853 
 
 Ramage, A. S 839 
 
 Rice, B. W 792 
 
 Robinson, Cyrus 900, 901 
 
 Robson, G 678, 753 
 
 Rork, C. E 887 
 
 Ross, M. P.. 772 
 
MISSOURI SCHOOL OF MINES. 93 
 
 Rouse, A. M 749 
 
 Rowand, J. T 746 
 
 Rowland, L. G 903 
 
 Ruthenburg, Marcus 829 
 
 Samuel, M. R. A 718, 722, 830, 834 
 
 Sanders, W. M 796, 827, 843 
 
 Saunders, R. E 711 
 
 Schammell, J. B 684, 779 
 
 Schick, K 743, 855 
 
 Schwarz, A 701, 777, 797-802, 807, 813 
 
 Schwarz, Alice H 781 
 
 Schwarz Ore Treating Company 781, 797-802, 807, 813 
 
 Sherwin-Williams Company 867 
 
 Smith, A. H 856, 857 
 
 Smith, B. S 846, 888 
 
 Stenning, W. W 896 
 
 Stevens, W. S 880 
 
 Stovel, H. R 682 
 
 Sulman, B. A 714, 826 
 
 Sulman, H. L 690, 693, 696, 705-707, 710, 712-716, 720, 723, 726, 785, 
 
 790, 793, 809-811, 823, 826, 833, 838 
 
 Terry, J. T., Jr 871 
 
 Towne, R. S 901 
 
 Tucker, S 739, 740, 865, 875 
 
 Tunbridge, John 783 
 
 Tunbridge, Virginia 783 
 
 Tyden, E. O. E 744, 893 
 
 United States Graphite Company 758 
 
 Van Meter, J. W Tr- 772 
 
 Ward, C. H 795 
 
 Wentworth, H. A 831, 837, 840 
 
 Wheelock, C. F 764 
 
 Williamson, G. R 749 
 
 Wolf, J. D 695, 697, 789, 824, 825 
 
 Wolf, J. W 763 
 
 Wood, H. E 863, 869 
 
 Wood, L. A. . 898 
 
94 MISSOURI SCHOOL OF MINES. 
 
 AUTHOR-SUBJECT INDEX 
 
 (Numbers refer to items and not to pages.) 
 
 Absorption 553, 556 
 
 Acid flotation 85. 104, 199 
 
 Acid-Gas flotation 393 
 
 Adams, W. J 47 48 
 
 Adsorption 556, 588 
 
 Adsorption phenomena 584 
 
 Agitation froth process 326 
 
 Air-froth 517 
 
 Alexander, Jerome 557 
 
 Allen, A. W 558 
 
 Allen, G. L 424, 526 
 
 Amalgamated Zinc Co 138, 139, 171, 172, 182, 202, 251, 341 
 
 American Direct Concentration Co 118 
 
 American Ore Flotation Co 461 
 
 Anaconda Mine 335, 402, 429, 466, 476, 485 
 
 Antimony ore 14, 308 
 
 Arentz, S. S 404, 488 
 
 Ashcroft, J. W 252-255 
 
 Ashley, H. E 559, 560 
 
 Bains, Thomas M 423 
 
 Ballot, Webster, Litigation 555, 636 
 
 Bancroft, W. D 561-564 
 
 Barclay, A 140 
 
 Barker, J. T 578 
 
 Barr, James A 4 
 
 Bartlett, J. C 565 
 
 Bastin, E. S 203 
 
 Bathurst, F. H 49 
 
 Belchic, George 424, 530 
 
 Bennett, W. E 141 
 
 Benson, Clara C 566 
 
 Bergwerks Wohlfahrt 399 
 
 Bevan, John 373 
 
 Billitzer, Jean 567, 568 
 
 Bisbee ores 392, 471, 513 
 
 Bismuth ore 308 
 
 Block, James A 425 
 
 Blyth, W. B 426, 427 
 
 Bornstein, Richard 532 
 
 Bousqupt, G ?1 - 311 
 
 Boys, C. V 533, 569 
 
 Bradbury, Robert H 570 
 
 Braden Copper Co 256, 331, 371, 441 
 
 Bradford process 428, 498 
 
 Bretherton, S. E .- 488 
 
 Briggs, Henry 374 
 
 Briggs, T. R , 571, 572 
 
 Britannia Mining and Smelting Co 322 
 
 British Ore Concentration Syndicate 30 
 
 British Ore Concentration Syndicate, Litigation 621, 634, 65 
 
MISSOURI SCHOOL OF MINES. 95 
 
 British Ore Concentration Syndicate vs. Minerals Separation Ltd. 
 
 619, 636, 659 
 
 British Ore Concentration Syndicate vs. Webster Ballot et al 636 
 
 Broken Hill (N. S. W.) District 6, 16, 24, 27, 49, 58, 59, 69-71, 74 
 
 76-78, 84, 86, 89, 90, 115-117, 121, 122, 130, 138, 139, 142, 148, 156, 160 
 
 162, 163, 166, 170-172, 174, 178, 182, 184, 195, 200, 202, 204-211, 216, 229 
 
 230, 233, 238, 245, 251, 285, 309, 312, 328, 329, 340, 349, 350, 351, 363 
 
 365, 367, 368, 390, 418, 420, 430, 453, 475, 477 
 
 Broken Hill Proprietary Co., Ltd., Litigation 636 
 
 Brown, A. Selwyn, see Selwyn-Brown, A. 
 
 Burro Mountain 375 
 
 Bush, F. V 375 
 
 Butte and Superior Copper Co 266, 294, 300, 313, 314, 385, 409 
 
 Butte and Superior Copper Co., Litigation 630, 645, 647, 663 
 
 Butters, Charles 431, 432, 503 
 
 Gaetani, Gelasio 573 
 
 Callow, J. M 433-436, 480, 519 
 
 Callow machines 479 
 
 Callow process 394, 433-437, 45.6, 457 
 
 Callow tanks 335 
 
 Cameron, Frank K 500, 574 
 
 Campbell, D. G 315, 450 
 
 Canada Zinc Commission 5 
 
 Capillarity 554, 611, 617 
 
 Carbolic acid 467 
 
 Carnotite ores 258, 319, 405 
 
 Carthew, J 172 
 
 Cattermole process 10, 250, 350, 498 
 
 Caucasus Copper Company 143 
 
 Central Mine rrv 214, 477 
 
 Channing, J. Parke 330, 376 
 
 Chapman and Tucker process 377 
 
 Cheticamp, Cape Breton 57 
 
 Chile 347 
 
 Clay, Colloid matter in. 559, 560 
 
 Clay washing 10 
 
 Clark, Donald 6, 50, 51, 1*4, 173, 174 
 
 Clarke's process 207 
 
 Claudet, H. H 60, 111 
 
 Clausthal 407 
 
 Clennell, J. E 432 
 
 Clifford Dry Concentrating Co 382 
 
 Coal tar 467, 490 
 
 Cobalt ores 392, 471, 472 
 
 Cobar Gold Mine 167, 168, 321, 334 
 
 Coeur d'Alene 239, 287, 338, 394, 458, 486 
 
 Cohn, Jesse E 379 
 
 Collins, George E 378, 439 
 
 Colloidal mixtures . . 595 
 
 Colloids ..535, 540, 544, 548, 550,- 551, 553, 557-560, 563, 566-57Q, 573, 575 
 
 579, 58G, 589, 594, 603, 606, 613, 615 
 
 Colloids, Bibliography 531 
 
 Colorado School of Mines Plant 454 
 
 Coolgardie field 230 
 
196 
 
 MISSOURI SCHOOL OF MIXES. 
 
 5 Coniagas silver ore ................................................. 472 
 
 co Conservation ..................................................... 452 
 
 5 Consolidated Arizona Smelting Co .......................... 391, 462, 521 
 
 I Copper ores ..... 47, 68, 72, 109, 110, 141, 143, 180, 252-256, 282, 305, 308 
 
 313, 314, 320, 323, 324, 328, 331, 332, 371, 388, 434, 440-442, 459, 463, 464 
 
 467, 487, 491, 521 
 I Cordoba Copper Mine ...................................... 290, 292, 295 
 
 1 Corliss, Harry P ................................................. 576 
 
 ! Costs ................. . ........................... 4, 399, 405, 519, 521 
 
 j Coutts, J ......................................................... 443 
 
 Crane, Walter R ................................................... 1 
 
 Criley and Everson process ........................................ 13 
 
 Cripple Creek ......................................... . ........... 455 
 
 Croasdale, Stuart ................................................. 620 
 
 Crocker, J ........................................................ 213 
 
 Cyaniding ..................................................... 384, 451 
 
 Darrow, Wilton E ................................................. 87 
 
 Data .......................................................... 532, 543 
 
 Data, Classification of ........... .................................. 530 
 
 Debavay process ...... 10, 70, 74, 79, 88, 114, 116, 117, 138, 139, 145, 170- 
 
 172, 176, 182, 202, 228, 251, 261, 28G, 340, 364, 368 
 Debavay process, Litigation .............................. 629, 638, 668 
 
 Debavay vs. Macquisten ................... ..................... 636 
 
 3 Delprat process ....... 6, 8, 10, 33, 34, 38, 44, 50, 70, 74, 79, 88-90, 104 
 
 3 115, 116, 124, 328, 660 
 
 Descroix, L ...................................................... 146 
 
 Devaux, H. E ..................................................... 577 
 
 g Diamond recovery ............................................... 63 
 
 Dispersoid chemistry, see Colloids. 
 
 Divine, R. D. . . . ................................................. 488 
 
 Dolcoath, Cornwall ............................................ 109, 113 
 
 Donaldson, R. J ............................................ ____ 214 
 
 Donnan, F. G ..................................................... 578 
 
 Donnan pipette .................................................. 539 
 
 Dorr machines .................................................. 520 
 
 Dreibrodt, .................................................... 262 
 
 Drucker, A. E .......................................... . ........ 444 
 
 Drucker, K ...................................................... 542 
 
 Durell, C. T ............................................. 263, 445, 446 
 
 Easton, W. B .................................................... 447 
 
 Eddingfield, F. T ................................................. 316 
 
 Electrical theory ............ .................................... 423 
 
 Electromagnetic process ..................................... :. . . 81 
 
 Elm Orlu Mine ................................... . ...... 385, 389, 508 
 
 Elmore, A. S ............................. 52, 61, G2, 91-94, 147-149, 216 
 
 Elmore vs. Ballot ............................. .................... 655 
 
 Elmore vs. Minerals Separation, Ltd ................................ 636 
 
 Elmore vs. Sulphide Corporation .................................. 632 
 
 Elmore patents, Litigation. .. -621, 624, 625, 627, 634, 641, 646, 651, 657 
 
 658, 675 
 Elmore process ........ 10, 12, 14, 18, 19, 21-23, 25, 28, 29, 36, 40, 42, 43 
 
 60, 62, 63, 66, 67, 88, 91-98, 106, 108-111, 116, 117, 119-121, 123, 126, 129, 
 133, 134, 137, 140, 141, 146-150, 152, 156, 160, 167, 170, 179, 181, 206 
 216, 232, 243, 246, 249, 257, 264, 293, 295, 296, 317, 368, 376, 489 
 
MISSOURI SCHOOL OF MINES. 97 
 
 Elmore process, see also Vacuum-flotation, 
 
 Emulsification ,. 564 
 
 Emulsions '. 571, 572, 592 
 
 Engels Mine 501 
 
 Eucalyptus oil 217-219, 345 
 
 Everson, Carrie J 8, 439,481 
 
 Falkenberg, Otto 318 
 
 Farrier, Val 340 
 
 Federal Lead Co 419 
 
 Federal Mill 355 
 
 Federal Mining and Smelting Co 225, 34l 
 
 Fields Electric Flotation Co 491 
 
 Finlay, Alex 534 
 
 Fir oils 467 
 
 Fischer, Siegfried 319 
 
 Flat River District 388 
 
 Fleming, J. A. 449 
 
 Flotation Processes, Bibliography 1-3 
 
 Foams 339, 535, 566, 605 
 
 French, Herbert J 392, 471, 472, 513 
 
 Freundlich, Herbert 535 
 
 Friedrichssegen Mine 277 
 
 Froment patents, Litigation 647 
 
 Frost, G. J 393 
 
 Froth process 267, 326, 344, 473, 510, 516, 517, 605 
 
 Fuel oils 467 
 
 Gahl, Rudolf 474 
 
 Galbraith, C. S 475 
 
 Gallenkamp, W 600 
 
 Garrison, Fielding H ^ 579 
 
 Garver, M. M 580, 581 
 
 Gayford, Ernest 394 
 
 General Engineering Co 425 
 
 General Exploration Co 491 
 
 General Naval Stores Co 469 
 
 Getman, F. H 536 
 
 Gibbs, J. W 537, 538, 579 
 
 Gibb's theory 537, 578, 579 
 
 Gibson, A. H 582, 583 
 
 Gillies' process 88, 99, 116, 117 
 
 Glasdir Copper Mine 23 
 
 Globe-Miami .... 456 
 
 Godfrey, J. R 24, 27, 38 
 
 Gogo juice 316, 333 
 
 Golconda, Nevada 118 
 
 Gold-Copper ore 324 
 
 Gold Hunter Co 457, 458 
 
 Gold King Mine 497 
 
 Gold ore 87, 167, 168, 282, 308, 316, 333,373, 406, 426, 427 
 
 431, 444, 497 
 
 Gcipner, C . 100, 119-122, 129 
 
 Granulation process 70 
 
 Graphite 127, 154, 203, 308, 343 
 
 Greenway, T. J 16 
 
98 MISSOURI SCHOOL OF MINES. 
 
 Greenway process 498 
 
 Greenway and Lowry process 395 
 
 Guess, H. A 222 
 
 Haglund, G. . . \L01 
 
 Hamilton, J. F 53 
 
 Hancock jig 355 
 
 Harris, J. E 584 
 
 Hatschek, E 555 
 
 Haultain, H. E. T 585 
 
 Hayden, Ralph 335 
 
 Haywood, Bryan 123, 129 
 
 Hebbard, James 477 
 
 Herwegen, Leo 268, 269, 302 
 
 Heym, Ingenieur 396 
 
 Hiendelaencina (Spain) District 327 
 
 Historical sketch 436 
 
 Hofstrand, O. B 271, 336, 342 
 
 Holmsen, Holm 183 
 
 Holtmann, - 271 
 
 Hoover, H. C 152 
 
 Hoover, T. J 2, 7, 184-186, 272, 337 
 
 Hoover process 187 
 
 Horwood, E. J 397 
 
 Horwood process 142, 144, 153, 172-174, 177, 181, 188,201, 244, 249 
 
 273, 359, 390, 397, 398, 413, 417, 418, 420, 478, 498 
 
 Horwood, E. J. Litigation 638 
 
 Hyde, J. M 399, 622, 623, 626, 630, 631, 636, 639, 640, 644, 647, 
 
 663, 670, 671, 677 
 
 Hyde Process 274, 294, 480 
 
 Hunter Mining Co 458, 479 
 
 Huntington, A. K 73, 78 
 
 Huston, George 338, 523 
 
 Ingalls, H. W 479 
 
 Ingalls, W. R 65, 74, 102, 103, 124, 125, 223 
 
 Independence Plant 455 
 
 Inouye, Tadashiro 275 
 
 Inspiration Mine 320, 456, 459, 470, 474 
 
 Jackson, F. H 104 
 
 Jaff e, Richard 339, 344 
 
 James, J. C 340 
 
 Jamison, R 586 
 
 Janek, A 540 
 
 Japan, flotation in zinc ores 275 
 
 Joplin District 382, 400 
 
 Joplin-Galena Slime 424 
 
 Joplin Separating Co 247 
 
 Keedy, Dyke V 401 
 
 Kendall Graphite Process 154 
 
 Kenrick, Frank B.. 587 
 
 Kenyon, W. Houston 517 
 
 Kirby, E. B 75 
 
 Kithil, K. H 405 
 
 Kohlrausch, Friedrich 541 
 
 Kuchs-Laist Centrifugal Separator 335 
 
MISSOURI SCHOOL OF MINES. 99 
 
 Kyloe Copper Mine . 252-255, 305, 323 
 
 Laist, Frederick 402 
 
 Landolt-Bornstein 532 
 
 Laughlin, J. P. M 480 
 
 Lavers Process 498 
 
 Le Roi No. 2, Ltd 28, 60, 66 
 
 Lead Ores 89, 185, 215, 303, 312, 352, 379, 388 
 
 Leuschner Process 271, 276, 277 
 
 Levy, Ernest 155 
 
 Lewis, W. C. M 588 
 
 Linde, R 126, 129, 156 
 
 Liquid jets 445 
 
 Litigation 618-677 
 
 Liwehr, A. E 403 
 
 Lloyd Copper Co 482 
 
 Louis, Henry 8 
 
 Low, V. F. Stanley 482 
 
 Lowry Process 498 
 
 Ludwigseck Mine , 277 
 
 Luther, R 542 
 
 Lyon, D. A 488 
 
 Lyster Process 249, 329, 359 
 
 Lyster Process Litigation 638 
 
 McClave, J. M 278, 483 
 
 McDermott, Walter 17, 26, 37, 55, 190 
 
 McPherson, R. H 589 
 
 Macquisten Process 10, 102, 105, 118, 125, 132, 165, 181, 191, 220 
 
 224, 225, 270, 279, 280, 336, 341, 342, 471, 480 
 
 Macquisten Process Litigation 636, 638 
 
 Magnetic Separation ^- 6, 238, 247 
 
 Marie, Ch 543 
 
 Marvin, Henry A . 484 
 
 Mary Murphy Mine 378, 401, 411, 492 
 
 Mathewson, E. P 485 
 
 Measurements, Physical 539, 541 
 
 Megraw, H. A 486, 487, 524 
 
 Menendez, J 357 
 
 Mercury ore , 308 
 
 Meuskens, Cl 282 
 
 Mexican practice 465 
 
 Miami Copper Co., Litigation 639, 650, 667, 670 
 
 Mickle, K. A , 226, 227, 283-285 
 
 Mill design 529 
 
 Miller, B. L 343 
 
 Miller, W. L 589 
 
 Milne, David 24, 27, 38 
 
 Minerals Separation Ltd., Litigation 619, 627, 629, 630, 636, 638, 642 
 
 643, 645, 651, 659, 661, 664, 674 
 
 Minerals Separation Ltd., process 8, 10, 88, 116, 117, 131, 160, 170, 172 
 
 206, 208, 211, 218, 228, 236, 243, 249, 253, 256, 257, 282, 286, 295, 302, 305 
 320-322, 324, 328, 332, 334, 346-349, 353, 360, 363, 364, 366, 368, 376, 389 
 
 441, 456, 494, 505, 508, 517 
 Minerals Separation Ltd., vs. British Ore Concentration Syndicate, 
 
 621, 634, 658 
 
100 MISSOURI SCHOOL OF MINES. 
 
 Minerals Separation Ltd., vs. Debavay 668 
 
 Minerals Separation Ltd., vs. Elmore 641, 646 
 
 Minerals Separation Ltd., vs. Hyde 622, 623, 626, 627, 630, 631, 636 
 
 Minerals Separation Ltd., vs. Miami Copper Co 639, 650, 667, 670 
 
 639, 644, 647, 663, 671, 677 
 
 Minerals Separation Ltd., vs. Ore Concentration (1905) 649 
 
 Minerals Separation, Ltd., vs. Potter 648 
 
 Minkowski, H 590 
 
 Mitchell, D. P 231 
 
 Mitsui Mining Co 275 
 
 Moldenhauer, Max 232, 288, 289 
 
 68fr '808 '902 'ZSZ 'ISZ '623 'WZ '19 '68 '62 umuapq^opM 
 
 Moore, R. B 405 
 
 Morning Mine 341 
 
 Motherwell, William 406 
 
 Mt. Morgan 406 
 
 Mueller, W. A 490 
 
 Mukhopadhyaya, Jnanendranath 591 
 
 Miiller, A 444, 531 
 
 Mullan, Idaho 457 458, 480 
 
 Murex Magnetic Co., see Murex process. 
 
 Murex process 15, 155, 157-159, 161, 172, 189, 192, 209, 233, 249, 290 
 
 291, 292, 295, 318, 354, 372, 399, 407, 408 
 
 Murex process, Cost 399 
 
 Murex process, Litigation 638 
 
 Murgne Gorge 143 
 
 National Copper Co 394, 480 
 
 Newman, P. R 592 
 
 Newman, J. M 349-352 
 
 Newton, P. M 9, 234, 235 
 
 Nicolai, G 593 
 
 Nicholas, P. C 127 
 
 Norris, Dudley H 653 
 
 Noyes, Arthur A 594, 595 
 
 Nutter, E. H 236 
 
 Nutter process 498 
 
 Ohio Copper Co 491 
 
 Old Dominion 494 
 
 Oil- and Acid-Flotation 276 
 
 Oil films 596 
 
 Oil flotation 4, 17, 20, 22, 26, 28, 32, 35, 36, 37, 40, 41, 43, 45, 46, 48. 
 
 55, 67, 75, 80, 87, 129, 179, 184, 185, 194, 198, 238, 252, 294, 295, 300 
 
 353, 362, 400, 409, 433, 447, 476, 480, 481, 483, 493, 509, 512, 516, 654 
 
 Oils 435, 468, 469 
 
 Oils, see also names of different kinds of oils. 
 
 Oils, Testing 10, 443, 514 
 
 Ore Concentration Syndicate 22, 29, 160, 168, 237 
 
 Ore Concentration Syndicate, Litigation 649, 656, 657 
 
 Ore Concentration Syndicate vs. Sulphide Corporation 637, 652 
 
 Ore Concentration Syndicate, see also, Elmore process. 
 
 Orijarvi Mine, Finland 248 
 
 Ostwald, W 538, 545, 553 
 
 Ostwald-Luther 542 
 
 Pape, W. A. C.. . . 597 
 
MISSOURI SCHOOL OF MINES. 101 
 
 Parmelee, H. C 297, 411 
 
 Partington, J. R 546 
 
 Patent law 628 
 
 Patents 9, 235 
 
 Patents, List of 678-903 
 
 Patents, 1915 525 
 
 Pegg, A. J 161 
 
 Petroleum 20 
 
 Phelps, Dodge & Co 375 
 
 Pine oil 412, 467, 495, 527 
 
 Pine tar oil 476 
 
 Platinum ores 52 
 
 Plummer, John 130, 162, 195 
 
 Pneumatic flotation 434-437 
 
 Pockels, Agnes 598 
 
 Pockels, F 547 
 
 Poole, W 163, 238 
 
 Port Pirie 6, 89, 340 
 
 Potter process 6, 8, 10, 38, 50, 51, 56, 70, 74, 79, 83, 104, 116, 117, 124 
 
 129, 181, 193, 196-198, 249, 328 
 
 Potter process, Litigation 648, 660 
 
 Potter vs. Broken Hill Proprietary Co., Ltd 636 
 
 Potter-Delprat agreement 662 
 
 Potter Sulphide Ore Treatment Co. vs. Minerals Separation, Ltd 661 
 
 Preferential process, see Differential flotation. 
 
 Prentiss, F. H 106 
 
 Probert, F. H 68 
 
 Processes, History 151, 169 
 
 Prosser, W. C 497 
 
 Putz, O 361 
 
 Quincke, G 599-608 
 
 Ralston, O. C 498-500, 526 
 
 Ramsden, W 609-610 
 
 Rayleigh, Lord 611 
 
 Read, Tnomas T 501 
 
 Rees, H. N 183 
 
 Residue, Disposal 507 
 
 Residuum oil 53 
 
 Revett, Ben S 502 
 
 Richards, Robert H 10 
 
 Richardson, Clifford 613 
 
 Rickard, T. A 11, 503, 504 
 
 Rohland, Paul 548 
 
 Rolker, C. M 20, 21 
 
 Ronnan, Fred P 57 
 
 Rossland 62 
 
 Roth, Walther A 532 
 
 Rudorf, G 78, 616 
 
 St. Joseph Lead Co 387 
 
 Salinger, Herbert 505 
 
 Salt-cake process 31, 50, 58 
 
 Sancton, A. H 42, 43 
 
 Sanders process 164, 480 
 
 Santa Cecilia Mine . . 327 
 
102 MISSOURI SCHOOL OF MINES. 
 
 Sawyer, B 172 
 
 Schmidt, Hugo F 572 
 
 Schneider, G. W 300 
 
 Scholtze, G 301 
 
 Schranz, K 414 
 
 Schwarz, Alfred 415, 506 
 
 Scott, W. A 239, 667 
 
 Selective notation, see Differential flotation. 
 
 Selwyn-Brown, A 69, 132, 1G5 
 
 Sewell, F. W 166 
 
 Shellshear, \V 304, 364, 507, 668 
 
 Sherwood, C. F 527 
 
 Siebenthal, C. E 240 
 
 Silver ores 282, 308, 327, 464, 472 
 
 Silver Peak Mine 510 
 
 Silverton, Colo 461 
 
 Simons, Theodore . . 508, 509 
 
 Simpson, W. E 197, 198 
 
 Slime 573 
 
 Slime agitation 438 
 
 Slime concentration 190 
 
 Slime settling 135 
 
 Slime treatment 159, 207, 365, 420 
 
 Smith, H. Hardy 305, 510 
 
 Smith, R. W 511, 512 
 
 Snover, G. R 80 
 
 Soap-bubbles 533, 569 
 
 Soluble components, Effect of 448 
 
 Southeast Missouri 387, 419 
 
 Spencer, J. F 549 
 
 Spicer, H. N 365 
 
 Steckel, A. P 81 
 
 Stieglitz, Julius 550 
 
 Stocker, J 167, 168 
 
 Storen, R 133, 134 
 
 Sulitjelma, Norway 180, 181, 183 
 
 Sulman, H. L 135, 241, 242, 366, 614 
 
 Sulman and Picard vs. Wolf 636 
 
 Sulman-Picard-Ballot process 8 
 
 Sulphide Corporation 6, 10, 160, 162, 180, 243 
 
 Sulphide Corporation, Litigation 632, 637, 652 
 
 Summary 1910 175 
 
 Summary 1912 V. . 260 
 
 Summary 1915 522, 524, 529 
 
 Surface-concentration 588 
 
 Surface tension 534, 536, 539, 542, 545, 546, 549, 554, 555. 577, 578, 
 
 585, 587, 590, 598, 602-604, 607, 608, 617 
 
 Svedberg, Theodor 551 
 
 Swart, W. G 129, 136 
 
 Sweden 347 
 
 Swinburne, J 78, 616 
 
 Tables 532, 543 
 
 Tables annuelles 543 
 
 Taylor, W. W. . . . 552 
 
MISSOURI SCHOOL OF MINES. 103 
 
 Telemarken Copper Mine 141 
 
 Telluride ore . . : 308, 369 
 
 Tellus Limited 410 
 
 Testing for flotation 10, 526, 528 
 
 Testing machine 511 
 
 Timber Butte Milling Co 379, 463, 508, 509, 515 
 
 Tin ore 109, 147, 179 
 
 Tube milling 447 
 
 Tungsten ore 109 
 
 Tupper C. A 529 
 
 Tywarnhaile Copper Mine 110 
 
 Uranium 405 
 
 Users of flotation 386 
 
 Utah Leasing Co 505 
 
 Vacuum flotation 10, 92-98, 106-111, 117, 123, 134, 141, 146-150, 156, 
 
 168, 181, 183, 257, 296, 480 
 Vacuum-flotation, see also, Elmore process 
 
 Valentine, Octairo 45 
 
 Valentiner, S 421 
 
 Van Bemmelen, J. M 55 
 
 Van Meter, J. W 45, 46* 
 
 Van Meter process 45,54 
 
 Vanadium 405 
 
 Walker, Edward 83, 108-110, 1G9, 245, 368, 672, 673 
 
 Walker, T. L 12, 246 
 
 Washburne, C. W 6JI 
 
 Washoe Reduction Works 485 
 
 Water Clarifying 593: 
 
 Water, Viscosity __. 612 
 
 Water surfaces, Tension of 77^ 611 
 
 Wentworth, H. A 488 
 
 West End Mill, Tonopah 438- 
 
 Western Association of Technical Chemists and Metallurgists 129' 
 
 Whitaker, W. A 530 1 
 
 Wiggin, A F 402 
 
 Williams, Henry D 517 
 
 Willows, R. S ' 555 
 
 Winklemann, A 547, 556^ 
 
 Wittich, L. L 247 
 
 Wolf, J. D 674 
 
 Wolf, J. D., Litigation 636r 
 
 Wood, Henry E 306-308, 369, 370- 
 
 Wood, Henry E., Litigation 638" 
 
 Wood creosotes 467" 
 
 Wood process 1 307, 308, 325, 370, 518 
 
 Wood tar oils 467 
 
 Woodbridge, D. E 248 
 
 Yeatman, Pope 371 
 
 Yerranderie field 510 
 
 Zinc 5, 6, 31, 44, 49, 58, 59, 83, 84, 103, 122, 130, 152, 157, 170, 173, 
 
 177, 185, 186, 188, 200, 201, 206, 213, 215, 231, 240, 241, 245, 249, 250, 
 263, 272, 275, 278, 282, 299, 303, 308, 337, 352, 372, 379, 383, 390, 397, 
 
 404, 413, 424, 478, 488 
 
104 MISSOURI SCHOOF OF MINES. 
 
 Zinc Corporation 137, 152, 170, 172, 206, 211, 213, 231, 236, 249, 272, 
 
 340, 372, 390! 478 
 
 Zinc Corporation, Litigation 675, 677 
 
 Zinc production 333 
 
 Zsigmondy, Richard . 557 
 
MISSOURI SCHOOF OF MINKS. 105 
 
 PUBLICATIONS OF THE MISSOURI 
 SCHOOL OF MINES 
 
 BULLETIN GENERAL SERIES. 
 
 Vol. 1, No. 1, Dec. 1908. The human side of a mining engineer's 
 life. Edmund B. Kirby. (Commencement address, June 10th, 1908.) 
 
 Vol. 1, No. 2, 38th Annual Catalogue, 1909-1910. 
 
 Vol. 1, No. 3, June, 1909. Education for utilty and culture. Calvin 
 M. Woodward. (Tau Beta Pi address.) 
 
 Vol. 1, No. 4, Sept., 1909. The history and the development of the 
 Cyanide Process. Horace Tharp Mann. 
 
 Vol. 2, No. 1, Dec., 1909. The Jackling Field. School of Mines and 
 Metallurgy. 
 
 Vol. 2, No. 2, 39th Annual Catalogue, 1910-1911. (Out of print) 
 
 Vol. 2, No. 3, June, 1910. Some of the essentials of success. Charles 
 Sumner Howe. (Commencement address, June 1st, 1910.) 
 
 Vol. 2, No. 4, Sept., 1910. Friction in small air pipes. E. G. Harris, 
 Albert Park, H. K. Peterson. (Continued by Technical Series. Vol. 1, 
 No. 1 and 4.) 
 
 Vol. 3, No. 1, Dec., 1910. Some relations between the composition 
 of a mineral and its physical properties. G. H. Cox, E. P. Murray. 
 
 Vol. 3, No. 2, March 1st, 1911. 40th Annual Catalogue, 1911-1912. 
 
 Vol. 3, No. 3, June, 1911. Providing for future generations. E. R. 
 Buckley. (Tau Beta Pi address, May 24th, 1911.) 
 
 Vol. 3, No. 4, Sept., 1911. Fall announcement of courses. (Out of 
 print.) 
 
 Vol. 4, No. 1, Dec., 1911. Fortieth anniversary of the School of 
 Mines and Metallurgy of the University of Missouri. Parker Hall Me- 
 morial address. Laying of cornerstone of Parker Hall, Rolla, Missouri, 
 October 24th, 1911. 
 
 Vol. 4, No. 2, March, 1912. 41st Annual Catalogue, 1912-1913. 
 
 Vol. 4, No. 3, June, 1912. Mining and civilization. J. R. Finlay. 
 (Commencement address, May 31st, 1912.) 
 
 Vol. 4, No. 4, Sept., 1912. Fall announcement of courses, o. p. 
 
 Vol. 5, No. 1, Student Life. 
 
 Vol. 5, No. 2, March, 1913. 42nd Annual Catalogue, 1912-1913. 
 
 Vol. 5, No. 3, Never published. 
 
 Vol. 5, No. 4, Never published. 
 
 Vol. 6, No. 1, Never published. 
 
 Vol. 6, No. 2, March, 1914. 43rd Annual Catalogue, 1913-1914. 
 
 Vol. 6, No. 3, Never published. 
 
 Vol. 6, No. 4, Never published. 
 
 Vol. 7, No. 1, Never published. 
 
 Vol. 7, No. 2, March, 1915. 44th Annual Catalogue, 1914-1915. 
 
 Vol. 7, No. 3, June, 1915. Description of special courses in oil and 
 gas and allied subjects. 
 
 Vol. 7, No. 4, September,- 1915. Register of Graduates, 1874-1915. 
 
 Vol. 8, No. 1, Jan., 1916. Bibliography on Concentrating Ores by 
 Flotation. Jesse Cunningham. 
 
1106 MISSOURI SCHOOL OF MINKS. 
 
 BULLETIN TECHNICAL SERIES. 
 
 Vol. 1, No. 1, November, 1911. Friction in air pipes. E. G. Harris, 
 (Continuation, of General Series, Vol. 2, No. 4). 
 
 Vol. 1, No. 2, February, 1912. Metallurgy and ore dressing lab- 
 oratories of the Missouri School of Mines and Metallurgy. D. Cope- 
 land, H. T. Mann, H. A. Roesler. (Out of print.) 
 
 Vol. 1, No. 3, May, 1912. Some apparatus and methods for demon- 
 strating rock drilling and the loading of drill holes in tunneling. Lt. 
 E. Young. 
 
 Vol. 1, No. 4, August, 1912. Friction in air pipes. E. G. Harris. 
 \( Continuation of Vol. 1, No. 1, November, 1911.) 
 
 Vol. 2, No. 1, August, 1915. Comparative Tests of Piston Drill Bits. 
 C. R. Forbes and L. M. Cummings. 
 
 Vol. 2, No. 2, November, 1915. Orifice Measurements of Air in Large 
 Quantities. Elmo G. Harris. 
 
 Vol. 2, No. 3, February, 1916. Cupellation Losses in Assaying. Horace 
 T. Mann and Charles Y. Clayton. (In press.) 
 

 f==s3aB=i; 
 
 LD21A-60m-6,'69 
 (J9096slO)476-A-32 
 
 .General Library 
 
 University of California 
 
 Berkeley 
 
Makers 
 
 Syracuse, N. Y. 
 PAT. JAM. 21 V 1908 
 
 Missouri. University 
 
 M5 
 
 UNIVERSITY OF CALIFORNIA LIBRARY