CORNELL
UNIVERSITY
LIBRARY

 

 

 

 

ENGINEER; NG LIBRARY

 

 

iii
IMPERIAL MINERAL RESOURCES
BUREAU.

THE MINERAL INDUSPRY OF
THE BRITISH EMPIRE

FORETOS COUN CREE,

WAR PERIOD.

ATS EA De.

QU 13-1919,

 

LON DIN
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Pee ta Net
IMPERIAL MINERAL RESOURCES
BUREAU.

THE MINERAL INDUSTRY OF
THE BRITISH EMPIRE

AND

FOREIGN COUNTRIES.

WAR PERIOD.

ARSENIC.

(1913-1919.)

 

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1920.
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ae PREFACE.
J919 =

The present publication constitutes the first part of the digest
of information on the Mineral Resources of the British Empire
and Foreign Countries for the period 1913-1919. It is proposed
to issue each part as it is completed, as it is considered that
a more useful purpose will be served by so doing than by waiting
for the completion of the whole digest. In future the digest
will be issued annually. The parts are not monographs on the
respective.minerals, but rather are in the nature of synopses of
the information available as to the mineral industry for the
period under review.

Part IV. of the General Report of the Chief Inspector of
Mines for the United Kingdom dealt with the mining statistics
of the British Empire and Foreign Countries, but that publication
ceased to be compiled and issued after the year 1912. It is
necessary, therefore, to fill in the gap in statistical information

. created by the cessation of that work, and for this reason the

work of the Bureau has been devoted to giving some account of
the progress of the mineral production of the Empire and of
Foreign Countries over the period between 1913-1919.

The complete filling in of the hiatus is rendered difficult, and,
in respect of some countries, impossible, from the fact that
records are not in all cases available for the war years, but
every effort has been made to cover the ground as far as it is
possible, and it is anticipated that in the future annual publica-
tions the information will be much more complete.

Whereas in Part IV of the report of the Chief Inspector of
Mines the statistical matter was dealt with under the heading
of Countries, in the scheme of the Bureau it is dealt with under
the heading of Subjects, the better to meet the requirements of
the various mineral and metallurgical industries.

The question of adopting a uniform system of weights and
measures has been considered, and it has been decided, that
owing to the magnitude of the task involved in dealing with the
period 1913-1919, the work of conversion of the figures would
result in considerable loss of time in the publication of the infor-
mation collected. It is, however, proposed to adopt a more

uniform system in respect of current statistics in future issues
of the annual mineral digest.

Owing to the incomplete statistics available for the period
under review it has been decided only in very special cases to
graphically represent. statistics, but in issues dealing with sub-
sequent years considerable recourse will be had to graphical

representation.
O88 O93
do
3

Labour and accident statistics will not be included in the
1913-1919 period, but will be given in subsequent annual issues.

The Governors desire to record the obligation they are under
to the technical committees for their valuable advice and help
in regard to trade and technical matters generally in connection
with these publications.

R. A. 8. REDMAYNE.
Chairman of the Governors.
June, 1920.
2, Queen Anne’s Gate Buildings,
London, 8.W.1.

(31585) Wt, 32563697 500 221 (TS. Ps,370) HE St. G.2
CONTENTS.

GENERAL
WORLD’S PRODUCTION ...
PRICES
BRITISH EMPIRE ...
United Kingdom ...
Union of South Africa and Rhodesia ...
Cana da
India
Australia
FOREIGN COUNTRIES wis obs
REFERENCES TO TECHNICAL LITERATURE

Page.

mo Oo CO

11

11
15

16
17
19
GENERAL.

Arsenic minerals are rarely the direct object of mining enter-
prise. Realgar and orpiment, the two sulphides of arsenic found
in the form of veins in a fairly pure condition at some localities,
ure exceptions. Most of the ursenic of commerce is obtained in
the form of crude or refined white arsenic (arsenious oxide) as
a by-product in the metallurgical treatment of lead, copper,
silver, or other ores containing some arsenic-bearing mineral,
usually arsenopyrite. Tuarge amounts of arsenic have been
wasted in past years as smelter fume, especially in the
United States, but in recent years it has been recovered to an
increasing extent. This recovery serves two useful purposes: it
reduces the nuisance caused by smelter fumes, and the product
obtained is one of great utility in agriculture, glass manufacture,
and other industries.

Arsenic and its compounds have, indeed, a great variety of uses.
Little information is available as to the relative amounts con-
sumed in different industries, but these vary according to local
conditions in different countries. In the United States it is esti-
mated that glass manufacture claims about a third of the total
consumption. The remainder is used chiefly for agricultural
purposes, in the manufacture of weed-killers, insecticides, and
sheep-dip. ‘The use of calcium arsenate has been introduced
recently in the United States for the extermination of the boll-
weevil pest. in cotton cultivation,

Arsenic is added to shot for hardening purposes, but the total
amount used in the form of the element is comparatively small.

Other uses to which arsenic compounds are put include pig-
ments, leather-making, and taxidermy.

In connection with glass-making, arsenic is used to counteract
the colouring effect of metallic oxides, and to give brilliancy to the

lass.

, Small amounts of arsenic compounds are used medicinally. One
of the uses to which arsenic was put during the war was the
manufacture of poison gas.

Sodium arsenite is used largely in sheep and cattle dips, which
play an important part in agriculture. In Australia arsenic
compounds are used in the destruction of the prickly pear, which
is one of the most troublesome pests. Queensland consumes
annually 350 tons of arsenic, chiefly in this way, but this amount
is altogether inadequate for the purpose of coping with the
prickly-pear nuisance, and it is estimated that several thousand
tons a year would be needed merely to prevent the spread of the
pest, whilst to exterminate it altogether a vastly larger quantity
would be required.

In the latter part of the war period there was a large increase
in the demand for arsenic and its compounds and the price rose to
a remarkable extent. The London price of white arsenic, which
was £13 12s. 6d. per ton just before the War, rose gradually until
in February, 1918, it stood at £145 per ton. In sympathy with

31885 A2
6

rising prices there was an increased output, as shown in the
world’s production table given on page 7, and much prospecting
took place in Australia, Africa, and elsewhere for the purpose of
discovering new sources of supply.

WORLD'S PRODUCTION.

The figures for the world’s production of arsenic are incomplete,
and the practice of returning output in so many different ways in
official returns, without detailed information in some cases as to
the nature and composition of the product, makes it impossible to
compile a production table on a uniform basis.

A remarkable feature of the output figures given on
page 7, is the lack of progress shown towards produc-
tion on a large scale by all countries excepting the
United States of America, which by substantial annual
increments increased its output to such an extent that
the production for 1918 almost quadrupled that of 1913, and
was nearly double that of 1917. This feature is explained by the
fact that the increased production in the United States has merely
consisted in the increased recovery of waste arsenic from smelter
fumes, and has not involved the opening up of new mineral
deposits. It has been known for years that large amounts of
arsenic have been going to waste in such a way as to constitute a
public nuisance, and efforts to eliminate the nuisance, while at
the same time placing large amounts of a useful product on the
markets of the world, seem likely to meet with still, further
success. If so, the United States may be able to export large
amounts of white arsenic, as well as supply its own needs.
 

 

 

 

 

 

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BRITISH EMPIRE.

In the British Empire only the United Kingdom and Canada
lave figured prominently in the world’s arsenic production, to
which they contribute approximately equal amounts. Towards
the end of the period under review, South Africa and Australia
began to take production of arsenic seriously, but as yet their out-
put is small.

United Kingdom.*

Arsenical pyrites and white arsenic are obtained as by-products
in the treatment of tin and copper ores in Cornwall and Devon.
The product has been disposed of ut the mines partly in the form
of arsenical pyrites, the percentage of arsenic in which is not
recorded, and partly in the form of crude white arsenic obtained
by calcining the ore.

The arsenic output is obtained mainly from mines in the
Camborne-Redruth and Kit Hill-Calstock districts, where
the tin ores contain an admiature of arsenopymte. Mines
near (‘alstock, which were formerly worked tor copper ores,
rejected arsenical pyrites as useless, but the increase in value
arising from war demands induced the owners of these mines to
exploit the stopes as well as the dumps for arsenicul ore, and
the supplies of this ore at the mines appear to be large.

Tt will be seen from the output and value of arsenical py rites
und white arsenic, as shown in the following table, that the
increase in production has been small, but that the increase in
value has been comparatively large. In this table the production
of arsenic as arsenical pyrites is additional tu the production as
white arsenic..

Production of Arsenic in the United Kingdom.

 

Aysauteal Piywtws: White Arsenic, crude

 

 

 

and refined.
Year.

Quantity | Quantity

long tons male long tons aloe

(2,240 Ibs.) (2,240 Ibs.)
WY es eee | 35 29 1,695 | 16,616
1914... sais ae = _ 1,988 19,052
1915 | 421 233 2,496 32,779
1916 300 300 2,545 56,104
1917 434 2,599 2,626 146,031
IOUT ca ates to) 477 4,380 2.349 210,101
1919 ss Sis ose 75 — ee ee) —

 

 

 

® Mines and Quarries: General Report with Statistics. Part III. By the
Chief Inspector of Mines (Annual). Summary of Progress for 191%.
Geological Survey of Great Britain. Annual Statement of the Trade of
the United Kingdom.
10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Union of South Africa and Southern Rhodesia.*

Previous to the year 1917 there had been vo production of
arsenic for commercial purposes in South Africa, but the remark-
able advance in the prices of arsenic compounds during the war,
and the need for these in South Africa for agricultural uses, led
to the recovery of arsenic as a by-product at the Stavoren tin
mine in the Transvaal. During 1918 two companies engaged in
roasting tin ore erected condensing chambers for the purpose of
condensing arsenic, and started to produce about four tons of
white arsenic per month in the August of that year. The total
production in the Union of South Africa for 1918 is given as
15 tons, compared with 3 tons in 1917. The sales for 1918 are
returned as 18 tons valued at £1,759. The output for 1919 was
8 short tons valued at £663.

Arsenopyrite is of common occurrence in South Africa in
association with tin ore, and a considerable amount of arsenic
could, if necessary, be obtained as a by-product in mining and
treating those ores. Arsenic compounds occur also as impurities
in some gold and other ores of South Africa.

The Union of South Africa consumes annually about £80,000
worth of sodium arsenite for sheep und cattle dips. The value of
the total consumption of arsenic compounds ts stated to be about
£100,000, and the question of making the Union independent of
imports of this commodity has recently received attention. The
question is a very important one in relation to the agricultural
industries of the Union, as is indicated by the fact that during
1916 there were 6.936 dipping tanks in use in different parts of
the Union.

Rhodestu, where 640 dipping tanks were in use in 1917, has a
similar problem, and an attempt was made in Southern Rhodesiit
towards the end of the war to secure the recovery of white arsenic
as a by-product at one of the gold mines.

A production of 76 tons of arsenical ore, valued at £160, is
reported for Southern Rhodesia in 1914.

The Secretary for Mines in Southern Rhodesia reports as new
production 114 short tons of arsenic ore valued at £7,677 in 1918.
This was from the Umtali district. The greater part of the ore
produced was sent to the British South African Explosives
Company at Modderfontein, but towards the end of the year the
output was utilized for the manufacture of cattle dip, which was
found to be of good quality, and was welcomed locally on account
of the difficulty of securing cattle dip from overseas.

Canada.

Arsenopyrite 1s found abundantly in many parts of Ontario,
and some years ago there was a small output of arsenopyritic

 

* Official Year Book of the Union of South Africa, 1910-17. Annual Report
of the Government Mining Engineer Union of South Africa. Annual
Report of the Secretary for Mines, Southern Rhodesia.

+ Annual Report on the Minera! Production of Canada. Annnal Report of the
Ontario Bureav of Mines, Annual Report of the Minister of Mines, British
Columbia. Annual Report of the Trade of Canada.
12

concentrate from a gold mine operated at Goldboro in Nova
Scotia. During the period 1913-1919, however, the output of
arsenic in Canada was obtained almost wholly from the silver-
cobalt-nickel-arsenic ores of the Cobalt district, Ontario, the
arsenic being recovered as a by-product in smelting works at
Thorold, Deloro and Orillia.

According to ‘‘ An Act to encourage the refining of metals in
Ontario ’’ which was passed in 1907 and amended in 1912, a
bounty of half-a-cent per pound is offered by the Ontario Govern-
ment on white arsenic produced from arsenopyrite ores, but not
from ores carrying smaltite or niccolite or cobaltite, the total
bounty paid not to exceed $15,000 in any one year. In spite of
this bounty there was no production from simple arsenopyrite
ores during the period under review, and the producers in the
Cobalt district, by the terms of the Act, were not entitled to
the bounty.

Arsenical gold concentrates have been sent for some years past
to Tacoma in the State of Washington U.S.A. from the Hedley
gold mine in the Similkarneen district of British Columbia, but
it was not until 1917 that an arsenic recovery plant was installed.
During the last four months of 1917, and since that date, pay-
ment has been made for arsenic in these concentrates.

Production of White Arsenic in Canada.

Short tons Value

(2,000 lbs.) $
TOTS as ae ani 1,692 101,463
1914... a wi 1,737 104,015
1915... st its 2,396 147,830
1916... see avn 2,186 262,340
1917... ais cis 2,936* 669,431
1918... cise i 3,560t 563,639
TTD: a ded bie 3,192 508,770

 

(*) Including 280 tons of arsenic in concentrates.
(+) Including 1,078 tons of arsenic in concentrates.
(£) Including 530 tons of arsenic in concentrates.

Imports of Arseniate, Bi-Arseniate and Stannate of Soda
into Canada.

Value.
Pounds. $
1913... ian av 22,892 987
1914... any .. 14,889 604
1915... ion Lee 9,090 503
1916... le “e 15,779 1,228
1917_—... os ah 4,469 588

1918... 5 ae 121 34
1919... wa sins
13

Imports of Arsenious Oxide and Sulphide of Arsenic into Canada.

 

 

 

 

Arsenious oxide.* | Sulphide of arsenic.*
Total
Co sees pee ee | Value ($).
Ibs. Value ($). Ibs. Value (3).
|
1913... ae | 18,788 1,061 | 455,394 | 17,759 | 18,820
19d ise | OL 249 | 11494 ° 736 1,005
HONS: wc cae A 6h7 | 171,993 ° 5415 6.072
1916... sae wis 41,090 7,086 239,991 11,839 18,925
1917... .. | 247,610 | 391083 | 259848 22023 | 54,136
1918... sie sie gd 222 301,985 33,351 33,673
We tg es | | |

 

 

 

* Duty free.

Haeports of White Arsenic from Canada.

Short tons Value

(2,000 Ibs.) 3
1913... om wae 1,303 107,094
1914 aie oe ain LST6 182.567
1915... ro se 2318 174,190
1916... es a 1,975 197,458
1917... ms ss 4.286 SOT SOS
19S xa ote ad 2072 393,883

1919

Imports of Arsentous Oxide to Canada for Fiscal Years ending
March 81.

 

Quantity (Ibs.).

 

From

1
1913. | 1914. 1915. | 1916. | 1917. | 1918. 1919.
|

 

Onited Kingdom 7,808 | 15,370 ; 1,289 — _— 200 | -
United States ... | 7,115 | 3,693 | 3,944 | 13,737 | 46,429 | 241,988

 

 

Total —...._ | 14,923 | 19,063 | 5,233 | 13,737 | 46,429 | 242,188

 

 

 

 

 

 

 

 

 

 

 

Value (&).
From -
1913. | 1914. | 1915. | 1916. | 1917. | 1918. 1919.
| : | :
United Kingdom { 233 { 785 47 5 — 5d
United States... 5 330) ' 270 | 2ly | 642 779% | 31,329
Total ... | 563 | 1,064] 268 | 642 wave | 31,384 |

 

 

 

 

 
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15

India.*

The quantity of arsenic ore produced in India is insignificant,
and the country depends chiefly on foreign sources to satisfy its
internal demands. The clnef indigenous source of supply is the
orpiment mines of Chitral, but the output from them has fallen
off considerably during late years. Orpiment and realgar also
occur in scattered fragments on the moraines of the Shankalpa
glacier in Kumaun, where they are collected for sale in the local
bazaars. Arsenical pyrites is found associated with wolfram and
cassiterite in the veins of certain mines in the Mereui district
of Tower Burma. Large lumps of leucopyrite, an arsenide of
iron, occur in the mica-bearing pegmatites of the Hazaribagh
district, and other arsenides have been obtained from pyritic
lodes in various localities, but no attempt has vet been made to
recover arsenic from them.

The most important source of supply as regards India is the
Chinese province of Yunnan, whence large quantities are im-
ported into Burma by the Bhamo—Téng-yiie route. The mineral
is used mainly as a pigment in the production of the green and
gold colours of the Pagan lacquer work, and in the manufacture of
other Indian lac-wares. Small quantities of arsenical compounds
of Indian origin are exported, mainly to the Straits Settlements.

Imports of Arsente and its Oxides to India for fiscal years
ending March 81.

 

 

 

 

 

United Total Total Foreign
Kingdom. [British Empire.| Countries. Datel
Year.
Quantity) Value Quantity. Value [Quantity] Value |Quantity; Value
(owts.) | (£) | (ewts.) | (£) | (cwts.) | (£) | (ewts.) | (£)
[
1912-1913... | 197 | 226 | 1,041 | 1,253 828 /1,009 | 1,869 | 2,262

1913-1914... 31. | 270 | 1088 |1'361 | 1,852 |2’638 , 2'940 | 3999
1914-1915...’ 174) 181 | ’877 | "993 | 11196 11270 | 21073 |2'195
1915-1916... 332, 499) 1,750 |2,065)  '346 | 305 | 2:096 |2'370
1916-1917... 1,088 |3,722 | 2'311 | 5.448 80} 114 2391 |5'562
1917-1918... 313 {11380 | “444 1670 10} 13 | 454 1/683
1918-1919... |

 

 

 

 

 

* Annual Reports on the Mineral Production of India ; Records of the Geologi-
cal Survey of India. Annual Statement of the Sea-borne trade of British
India.
16

Exports of Arsenic (Indian Merchandise) from India for
fiscal years ending March 31.

 

 

 

Total Total
British Empire. | Foreign Countries. Pata,
Year.
Quantity.| Value. | Quantity.| Value. | Quantity.| Value.

(cwts.) (£.) (cwts.) (£.) | (ewts.) (£.)
1912-1913 a 202 328 7 10 209 338
1913-1914 i 86 163 — — 86 163
1914-1915 eis 139 283 — — 139 283
1915-1916 as 117 219 _— 117 219
1916-1917 °.. 55 134 8 16 63 150
1917-1918 aes — _ — — _ _—
1918-1919 one

 

 

 

 

 

 

 

Exports of Arsenic and its Oxides (Foreign Merchandise)
from India for fiscal years ending March 81.

 

 

 

Total Total
British Empire. | Foreign Countries. Toll:
Year.
Quantity.) Value. | Quantity.; Value. | Quantity.) Value.

(cwts.) (£.) (cwts.) (£.) (cwts.) (£.)
1912-1913 fi 25 38 8 8 33 46
1913-1914 ont 39 88 14 30 53 118
1914-1915 aes 4 9 18 24 22 33
1915-1916 a 3 6 _— _—. 3 6
1916 -1917 eee 38 106 29 77 67 183
1917-1918 via 2 7 4 11 6 18
1918-1919 ae

 

 

 

 

 

|
|
During the latter part of the war period, active prospecting for
arsenic minerals took place in various parts of Australia, with
productive results in Queensland and Western Australia. Arsenic
compounds are used in Australia to destroy the prickly pear (see
p- 5), jand it,was the need of supplies for this purpose that
stimulated prospecting.
The Queensland Government in 1917 reserved an area of 150
acres at Jibbinbar, in the Stanthorpe district, for the purpose of
prospecting for arsenic. The Beecroft mine near Sundown in
this district, produced 32 tons of arsenical pyrites valued at £580

Australia.

 

* Annual Report of the Under Secretary for Mines, Queensland. Annual
Report of the Department of Mines, Western Australia,
17

during 1917. Prospecting continued actively during 1918, and
a production of 199 tons of arsenical pyrites, valued at £2,981,
was obtained in that year in the Stanthorpe district chiefly from
the Beecroft mine. At this mine the ore is screened and jigged,
and the concentrates, which are estimated to contain 30 per cent.
of arsenic, ure sent to Bendigo, Victoria. A considerable amount
of development took place in the State mine at Jibbinbar, and
the erection of a concentrating and furnace plant with necessary
buildings and other equipment was commenced. The Queensland
arsenic output for 1919 is reported to be 58 tons.

The Mines Department of Western .\ustralia reports the
production in that State of 11 tons of arsenical ore valued at
£19 in 1916, 57 tons valued at £707 in 1917, and 697 tons valued
at £2,564 in 1918.

Arsenopyrite is reported to be widely distributed in Victoria,
and at Ballarat white arsenic is obtained from the flues of
roasting furnaces. The arsenic output of Victoria during 1919 is
reported to be 1,025 tons.

In June, 1918, the maximum price of white arsenic for purchase
by wholesalers in Australia was fixed at £60 per ton in containers
exceeding 1 ewt., and £63 per ten in containers of 1 cwt. or less.
For buyers other than wholesalers the rates were fixed at £66 and
£69 68. respectively, with 20 per cent. increase for packages con-
taining less than 56 Ibs. These rates apply to metropolitan
areas. For other areas cost of transport is added.

FOREIGN COUNTRIES.*

The chief producer of arsenic among foreign countries is the
United States of \merica where large amounts of white arsenic
are obtained as a by-product at numerous smelting works in the
Western States, remote from the Eastern ntarkets where it is
mostly consumed, and therefore liable to severe competition with
imported arsenic.

The production in the U.S.A. has increased by substantial
annual increments from 2,513 short tons, valued at $159,236, in
1913 to 11,323 short tons, valued at 52,112,550, in 1918. In addi-
tion to this output of white arsenic in 1918 there was produced
3,487 pounds of metallic arsenic, valued at $2,610.

The U.S.A. imports of arsenic and its compounds for 1918
included 1,847 short tons of white arsenic, valued at $441,212;
4,842 short tons of arsenic and orpiment, valued at $840,600 ; and
a quantity of sheep-dip valued at $23,538. The exports for that
year were of arsenic and orpiment of foreign origin, amounting to
80,050 pounds, valued at $12,017.

The Food Administration Department of the U.S.A. made a
detailed canvass in 1917 of the requirements of the different
trades using arsenic compounds, and found that the demand,
which was chiefly in connection with agriculture, was greatly in

 

* Mineral Industry (Annual). Mineral Resources of the United States; U.S,
Geol. Survey (Annual),
18

excess of the supply. It was estimated that the U.S.A require-
ments amounted to 12,000 short tons annually, whereas the avail-
able supply in 1917 amounted to only 9,787 tons.

The remarkable increase in the U.S.A. production during 1918,
as compared with 1917, and its close approximation to the
country’s requirements as ascertained by the Food Administrative
Department, is a notable feature, and is presumably attributable
to the co-operation of that Department with the Departments
responsible for the control of mineral production

Among other foreign producers France has figured prominently
as a producer of arsenical ore, but no details are available as to the
amount of white arsenic produced as a by-product from the
French arsenical ores.

There is a substantial output of arsenic in Mexico, where white
arsenic is produced at Mapimi.
19

REFERENCES TO TECHNICAL LITERATURE,

Arsenic, by A. Butts, Man. Ind., 1913-1918. ( Annual.)

Arsenic, antimony, and bismuth, by F. L. Hess; U.S. Geol. Surv.,
Min. Res. U.8. (Annual.)

The cobalt-nickel arsenides and silver deposits of Temiskaming, by W. G.
Miller; Rept. Bur. Mines, Ontario, 1913, 19, Part 2, 278 pp.

Ore deposits of Hu-nan and Hu-peh, by W. R. Schoeller; Journ. Soc.
Chem. Ind., 1913, 32, 517-519.

Determination of gases in smelter flues, and notes on the determination of
dust losses at the Washoe Reduction Works, Anaconda, Mont., by
KE. M. Dunn; Trans. Amer. Inst. Min. Eng., 1914, 46, 687-688.

Arsenic trioxide from flue dust, by J. O. Elton; Trans. Amer. Inst. Min.
Eng., 1914, 46, 690-702.

Method of mixing bismuth and arsenic, by W. Heike; Internat. Zeit.
Met., 1914, 6, 209. Abstr. in Journ. Inst. Metals, 1914, 12, 284.
Alloys of gold and arsenic, by A. P. Schleicher; Internat. Zeit. Met.,

1914, 6, 18. Abstr. in Journ. Inst. Metals, 1914, 11, 299.

Temiskamite, a new nickel arsenide from Ontario, hy T. L. Walker;
Amer. Journ. Sci., 1914, 37, 170-172.

Solidification of silver-arsenic alloys, by W. Heike and A. Leroux; Zeits.
anorg. Chem., 1915, 92, 119-126. Abstr. in Journ. Soc. Chem. Ind.,
1916, 35, 693.

Arsenic applied as a spray for weeds, by W. T. McGeorge; Journ. Agric.
Research, 1915, 5, 459-463. Abstr. in Journ. Sov. Chem. Ind., 1916,
35, 195.

Use of metallic arsenic, by F. Johnson; Met. Ind., 1916, 9, 462-463.

Influence of arsenic on copper, by F, Johnson; Met. Ind., 1916, 9, 648-652.

Queensland mineral deposits, No. 10: Arsenie, by B. Dunstan; Queens.
land Govt. Min. Journ., 1917, 18, 176-180.

Arsenical deposits in Queensland, by H. I. Jensen: Queensland (ovt.
Min. Journ,, 1917, 18, 582-583.

The influence of arsenic in brass, by O. Smalley; Journ. Soc. Chem. Ind.,
1917, 36, 429-439.

The Talisker mine, hy L. J. Winton; Rev. Min. Oper. S. Austr., No. 26,
1917, 91-93,

The condition of arsenic in glass and its réle in glass making, by E. T.
Allen and E. G. Zies; Journ. Amer. Ceramic Soc., 1918, 1, 787.
Abstr. Journ, Soc. Glass Technology, 1919, 8, 15.

Arsenic in ferro-alloys, by O. Binder; Chemiker Zeitung, 1918, 42, 619.
Abstr. in Journ. Inst. Metals, 1919, 21, 463.

Arsenic, cattle and sheep dips, sprays, etc.. by C. R. Edmonds; Rhodesia
Munitions and Resources Committee Report. 1918, 58-60.

Arsenic deposits of Jibhinbar, Queensland, by H. T. Jensen; Queensland
Govt. Min. Journ., 1918, 19, 120-123.

Arsenic and its occurrences in South Queensland, by H. I. Jensen;
Queensland Govt. Min. Journ., 1918, 19, 455-458, 503-508.

The effect of arsenic, antimony, and lead on 88:10:2 gun-metal, by R. T.
Rolfe; Journ, Inst. Metals, 1918, 20, 263-282.

Inorganic chemical industries: arsenica] compounds, by M. Rind]; Ss. Air.
Journ. Ind., 1918, 1, 1402. :

Precipitation of arsenic soot in the roasting of tin ores; Mining Mag.,
1918, 18, 214.

Der Balkan als neue Rohstoffquelle der Metallindustrie Deutschlands;
Arsen- Antimon- Wismut- und andere nutzbare Erzlagerstitten, von
H. E. Kepler; Metall und Erz, 1919, 16, 512-515. ;

Arsenic and antimony ores, by H. Dewey; Mem. Geol. Surv., Special
Repts. on the Mineral Resources of Great Britain, Vol. 15, London,
1920, 59 pp.
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