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 EDUCATION 
 
 
TEACHERS' JSAND:BQQK f ; 
 
 TO ACCOMPANY 
 
 ;CIENCE OF HOME AND COMMUNITY 
 
 BY 
 
 GILBERT H. TRAFTON 
 
 THE MACMILLAN COMPANY 
 1921 
 
 Copyright 1921, by The Mactmllan Company 
 
Publisher 
 
 EDUCATION DEPT 
 
 Li 
 
 TABLE OF CONTENTS 
 I. INTRODUCTION 
 
 II. ADAPTATION TO TYPES or SCHOOLS ....... 2 
 
 1 . Large city school 
 
 2. Small town school 
 
 3. Rural consolidated school 
 
 III. ADAPTATION TO LENGTH OF COURSES 3 
 
 1. One year course 
 
 2. Half-yeaj course 
 
 3. Two year course 
 
 4. Three year course 
 
 IV. LABORATORY AND FIELD PROJECTS ....,. 4 
 
 i Types of work 
 
 2. Adaptation to number of periods devoted to these projects 
 
 A. One period weekly 
 
 B. Two periods weekly 
 
 3. Projects for schools with limited facilities 
 
 A. Projects requiring no laboratory facilities 
 
 B. Projects requiring only the simplest apparatus 
 
 4. Cost of apparatus 
 
 5. Complete list of projects given in book 
 
o-C 
 
 I. INTRODUCTION 
 
 This Teachers' Handbook is prepared for the aid of teachers 
 who use the author's Science of Home and Community. At the 
 outset attention is called to the report on Reorganization of 
 Science in Secondary Schools, prepared by the science com- 
 mittee of the Commission on Reorganization of Secondary 
 Education, appointed by the National Educational Associa- 
 tion. This report has been published as Bulletin, 1920, No. 26, 
 of the Bureau of Education. Special attention is called to this 
 report here because it has made a valuable contribution toward 
 solving one of the perplexing problems of secondary education, 
 namely the problem as to what should constitute the aims of 
 science teaching in the high school. The general commission has 
 set forth the main objectives of work in the secondary schools, 
 and the science committee has adopted these objectives, which 
 may be briefly listed as follows: health, worthy home member- 
 ship, vocational guidance, citizenship, the use of leisure, and 
 ethical character. A study of the table of contents of Science of 
 Home and Community shows that the book deals with topics 
 that clearly help fulfill these objectives. 
 
 The author has purposely included more material than can 
 usually be covered in a year so as to allow a wider range of choice 
 on the part of those using the book. By this means the book 
 may be adapted to use in different types of schools. More 
 definite suggestions are given farther on regarding the adapta- 
 tion to these types. 
 
 The author has incorporated directions for field and laboratory 
 projects within the text because he believes that such an arrange- 
 ment is preferable to one in which the text and the practical 
 exercises are printed in separate books. It is believed that the 
 plan followed in the text has at least two distinct advantages. 
 First, it tends toward the development of a more unified course. 
 
 568843 
 
sc?PNcii:;oF HOME AND COMMUNITY 
 
 nia-ig'to both the text and the practical exer- 
 cise's to have them 'closely' related. In some schools teachers o 
 special sciences have fallen into the error of keeping these two 
 parts of the course as distinct and unrelated parts, and as a 
 result much of the laboratory work has little significance to the 
 pupil. This practical work has a much more vital character 
 when it is closely related to the text. 
 
 Second, the arrangement used in this text tends to encourage 
 doing more laboratory and field work. Unfortunately in some 
 schools general science is taught merely as a textbook subjec 
 without any practical work. Under such circumstances the sub 
 ject is deprived of a large amount of its greatest value. The 
 inclusion of directions for practical work in the text will natu 
 rally encourage a wider use of these exercises. 
 
 II. ADAPTATION TO DIFFERENT TYPES OF SCHOOLS 
 
 For the purpose of giving suggestions regarding the use of th 
 text, schools may be divided into three types: the large city 
 school, the small town school, and the rural consolidated schoo] 
 The fundamental principle to be applied in teaching genera 
 science is that the subject should be related intimately with th 
 life of the pupil. The more essential differences between rura 
 and urban schools relate to the space found in the home yard, 
 to the kind of wild plants and animals found in the neighborhood, 
 and to the applications of science commonly found in the locality. 
 In rural communities more attention may be given to garden- 
 ing and to the study of wild plants and animals than in the 
 urban communities. The following suggestions are for a year's 
 course. 
 
 1. For the large city school. 
 
 Omit chapters 4, n, 12, 13, 14, 15. 
 
 2. For the small town school. 
 
 Omit chapters 4, 13, 14, 19. 
 
 3. For the rural consolidated school. 
 
 Omit chapters 10, 17, 19, 23. 
 
TEACHERS' HANDBOOK 3 
 
 III. ADAPTATION TO DIFFERENT LENGTH OF COURSES 
 
 1. Year courses. 
 
 The suggestions already given under types of schools are for year 
 courses. 
 
 2. Half-year courses. 
 
 A half-year course may be worked out in two ways: first, either 
 Part I, Science of the Home, or Part II, Science of the Community, 
 may be taken; second, choice may be made from both parts. If the 
 second plan is followed, the following selection of chapters is suggested: 
 
 A. For large city schools. 
 
 Take chapters i, 2, 5, 7, 8, 10, 16, 18, 20, 22, 24, 26, 28, 
 3,32,33- 
 
 B. For small town schools. 
 
 Take chapters i, 2, 5, 8, 12, 18, 20, 22, 24, 26, 28, 30, 
 32, 33- 
 
 C. For rural consolidated schools. 
 
 Take chapters i, 2, 4, 5, 8, 12, 15, 18, 22, 24, 29, 30, 33. 
 
 3. Two year courses. 
 
 In some schools, especially in junior high schools, there is a tend- 
 ency to develop a two year course in general science. In such a course 
 the work may be divided as follows: 
 
 First year. Part I. Science of the Home. 
 Second year. Part II. Science of the Community. 
 If five periods a week are given each year, the time will permit a 
 more detailed discussion of the various topics than is given in the text. 
 Time may be taken for study of additional references and for the 
 presentation of many special reports by the members of the class. 
 
 4. Three year courses. 
 
 When a three year course is given extending through the yth, 8th, 
 and gth grades, the plan is often followed of devoting two or three 
 periods weekly for the first two years, and five periods for the third 
 year. For such a combination the following allotment of topics is 
 suggested: 
 
 First year. Science of the Home: the Home Grounds. Chapters 
 11-15. 
 
 Second year. Science of the Home: the Household. Chapters i-io. 
 
4 SCIENCE OF HOME AND COMMUNITY 
 
 Third year. Science of the Community: Chapters 16-33. 
 
 IV. LABORATORY AND FIELD PROJECTS 
 i. Types of work. 
 
 The laboratory and field projects constitute one of the most vital 
 features of the course. Teachers should plan to do a large amount of 
 this work. No course should be given without doing some of it. Six 
 types of these projects have been provided, which may be classified 
 as follows: 
 
 I. Schoolroom projects. 
 
 1. Laboratory projects. 
 
 Example: To study and test thermometers. Page 23. 
 
 2. Demonstration projects. 
 
 Example: To show how to use a camera. Page 131. 
 
 3. School projects. 
 
 Example: To make the schoolroom attractive by means 
 
 house plants. Page 141. 
 II. Projects outside of schoolroom. 
 
 1. Home projects. 
 
 Example: To make a study of the heating system us 
 your home. Page n. 
 
 2. Community projects. 
 
 Example: To investigate local health conditions with refer- 
 ence to water, milk, and foods. Page 363. 
 
 3. Field projects. 
 
 Example: To learn what shade trees are growing in your town 
 and if they are properly cared for. Page 484. 
 
 The demonstrations are to be done before the class either by the 
 instructor or by some pupil. It is intended that the laboratory projects 
 shall be performed by each pupil or by a group of pupils. The extent 
 to which it is advisable for each pupil to do the laboratory projects 
 depends partly on the equipment and the facilities available for indi- 
 vidual work. If space or duplicate equipment are lacking, the lab- 
 oratory projects may be performed as demonstrations. 
 
 One hundred and thirty two projects are provided. These are more 
 than can be done in a year, but the large number from which choice 
 may be made insures that some projects may be found that are 
 adapted to every type of school. 
 
TEACHERS' HANDBOOK 5 
 
 2. Adaptation to number of periods devoted to these projects. 
 
 A. Projects for one period weekly. 
 
 When one period weekly is devoted to this type of work, 
 the following projects are suggested. 
 
 a. For city schools. 
 Laboratory Projects. 
 
 Pages 35, 51, 75, 105, 132, 155, 290, 293, 377, 452, 487. 
 Demonstration Projects. 
 
 Pages 7, 17, 25, 106, 127, 260, 289, 382, 432, 439. 
 School Projects. 
 
 Pages 97, 141, 442. 
 Home Projects. 
 
 Pages n, 27, 42, 77, 87, 96, 147, 159, 521. 
 Community Projects. 
 
 Pages 363, 425, 493. 
 Field Projects. 
 
 Pages 282, 451, 484, 532. 
 
 b. For town and rural schools. 
 Laboratory Projects. 
 
 Pages 35, 51, 75, 105, 187, 189, 293, 404, 452, 467. 
 Demonstration Projects. 
 
 Pages 7, 18, 37, 47, 113, 127, 355, 382, 407, 432, 438. 
 School Projects. 
 
 Pages 97, 141, 179. 
 Home Projects. 
 
 Pages n, 27, 87, 96, 141, 147, 172, 200, 234, 237. 
 Community Projects. 
 
 Pages 41 5, 476. 
 Field Projects. 
 
 Pages 166, 194, 468, 282, 532. 
 
 B. Exercises for two periods weekly, 
 a. For city schools. 
 
 Those already given for one period and in addition the 
 
 following: 
 Laboratory Projects. 
 
 Pages 14, 23, 69, 101, 102, 114, 116, 158, 263, 512, 513. 
 Demonstration Projects. 
 
 Pages ic, 13, 18, 22, 124, 131, 278, 302, 339, 381, 407. 
 

 6 SCIENCE OF HOME AND COMMUNITY 
 
 School Projects. 
 
 Pages 143, 146, 485. 
 Home Projects. 
 
 Pages 31, 40, 57, 77, 113, 141. 
 Community Projects. 
 
 Page 392. 
 Field Projects. 
 
 Pages 177, 341,468. 
 b. For town and rural schools. 
 
 Those already given for one period and in addition the 
 
 following: 
 Laboratory Projects. 
 
 Pages 14, 41, 69, 101, 114, 116, 167, 290, 377, 487, 513. 
 Demonstration Projects. 
 
 Pages 13, 17, 22, 106, 131, 289, 302, 339, 439. 
 School Projects. 
 
 Pages 235, 442, 485. 
 Home Projects. 
 
 Pages 31, 77, 113, 178, 201, 209, 521. 
 Community Projects. 
 
 Pages 405, 425. 
 Field Projects. 
 
 Pages 177, 461, 484. 
 
 If three periods are devoted weekly to laboratory and field 
 
 work, practically ail the projects can be carried out. 
 
 3. Projects for schools with limited facilities. 
 
 The author wishes to call special attention to the value of those 
 projects that may be carried on outside of the schoolroom. The 
 greatest value of this type of work lies in the fact that it connects 
 school work with real life, because these studies are made under life 
 conditions. In the second place, this type of work helps solve the 
 problem of the expense involved in securing apparatus since it takes 
 things as they are and studies science in life as it actually exists in the 
 home and community. Hence this type of work is especially adapted 
 for those small schools which are limited in laboratory facilities and 
 equipment. 
 
TEACHERS' HANDBOOK 7 
 
 A. Projects requiring no laboratory facilities. 
 Home Projects. 
 
 On pages n, 27, 31, 40, 42, 57, 77, 87, 96, 109, 113, 141, 147, 
 
 159, 172, 178, 192, 200, 201, 209, 213, 219, 234, 237, 238, 521. 
 Community Projects. 
 
 On pages 363, 392, 405, 415, 425, 476, 493- 
 Field Projects. 
 
 On pages 166, 177, 194, 227, 253, 282, 341, 451, 461, 468, 
 
 484, 532. 
 School Projects. 
 On pages 97, 442. 
 
 B. Projects requiring only the simplest apparatus. 
 
 The projects here listed require only such simple apparatus 
 as may be obtained from the pupils' homes or from the 
 school equipment usually provided for the work in the other 
 sciences. These projects may be performed either as 
 demonstrations or as individual laboratory exercises. 
 Projects on pages 7, 14, 16, 17, 18,23,35,37,51,69, 75, 101, 
 105, 116, 127, 141, 143, 167, 176, 187, 189, 192, 196, 235, 
 289, 290, 293, 296, 302, 377, 382, 391, 404, 432, 439, 452, 
 467, 485, 487, 513. 
 
 4. Cost of apparatus, 
 
 In making out the following lists of estimates only approximate 
 figures can be given because prices are undergoing constant fluctua- 
 tions. These figures are based on prices quoted early in 1920. 
 
 Set i. Approximate cost, $50.00 
 
 This outfit includes only one set of material, and hence does not 
 allow individual laboratory work (except with very small classes), but 
 includes enough material to perform the individual exercises as 
 demonstrations, excepting those requiring the more expensive appa- 
 ratus listed below under set 3. Following is a list of the apparatus 
 included in the above estimate: 
 
 Apparatus 
 
 Flasks, rubber stoppers, glass tubing, rubber tubing, alcohol lamp 
 or Bunsen burner, tumblers, beakers, lamp chimney, test tubes, touch 
 
8 SCIENCE OF HOME AND COMMUNITY 
 
 paper, candle, ringstand, thermometer, pneumatic trough, wide 
 mouthed bottles, iron picture wire, deflagrating spoon, wire gauze, 
 plates, bicycle pump, kerosene lamp, plates of glass, rubber membrane, 
 pint milk bottle, glass model of pump, tin cup, red and blue litmus 
 paper, tuning fork, convex and concave lenses, printing frame, print- 
 ing papers, flowerpots, window boxes, bulbs, two bar magnets, horse- 
 shoe magnet, iron filings, small pieces of various metals, darning arid 
 knitting needles, insulated wire, large bolt, dry cells, electric bell, 
 push button, sal ammoniac cell, strips of sheet zinc and copper, cor 
 pass, rulers, insect breeding cage, outfit for candling eggs, collection 
 types of bird houses, galvanometer, small motor and dynamo, coffc 
 pot, small gyroscope, spring balance, overflow can, catch bucket, shot 
 thistle tube, pipette, petri dishes, culture medium, Snellen's visi< 
 chart, collections of samples of woods, weather maps. 
 
 Chemicals 
 
 Nitric acid, hydrochloric acid, sulfuric acid, ammonia, limewatei 
 potassium chlorate, manganese dioxid, sulfur, calcium carbide, dis 
 tilled water, potassium permanganate, silver nitrate, calcium sulfate 
 potassium bromide, lead acetate, iron alum, iodin solution, granulate 
 zinc, hypo, developing powders, formalin, baking powder, baking 
 cream of tartar, vinegar, salt, washing soda. 
 
 Set 2. Approximate cost, $100.00 
 
 This set includes enough duplicate material of apparatus listed in 
 set i for a class of thirty to do individual laboratory exercises, as w 
 as the simpler demonstrations. This estimate does not mean 
 enough duplicate material is provided so that all members of the c 
 shall be working on the same experiment at the same time. Such an 
 arrangement is not necessary, nor perhaps desirable. In making t 
 above estimate it is assumed that different members of the class wi 
 be working on several different projects during the same period, 
 some cases small groups of pupils may work together with one set o 
 apparatus. 
 
 Set j. Approximate Cost, $225.00 
 
 This outfit includes sufficient material to do all the practical work 
 outlined in the book. It includes the material listed under set 2 and 
 
TEACHERS' HANDBOOK 9 
 
 in addition the following more expensive apparatus needed for some 
 of the demonstrations: 
 
 Sling psychrometer, air pump, bell jar with open top, sonometer, 
 camera, kodak film tank, pair of field glasses for bird study, model 
 of steam engine, primary and secondary coils (the inner one removable) 
 small gas engine or a model of one, induction coil, set of telegraph in- 
 struments (sender, sounder, relay), small demonstration form of wire- 
 less outfit, dissectible telephone, aneroid barometer. 
 5. Complete list of projects given in book. 
 
 I. SCHOOLROOM PROJECTS 
 A. Laboratory Projects 
 
 1. To study the burning of wood, soft coal, and hard coal. Page 14. 
 
 2. To compare safety matches and ordinary matches. Page 16. 
 
 3. To study and test thermometers. Page 23. 
 
 4. To study the burning of a candle. Page 35. 
 
 5. To find out what conditions are needed to keep a candle burning. 
 Page 35. 
 
 6. To generate acetylene. Page 41. 
 
 7. To show that air has weight and hence exerts pressure. Page 51. 
 
 8. To show how a pump works. Page 52. 
 
 9. To test foods for different kinds of nutrients. Page 59. 
 
 10. To compare foods as regards their nutritive value. Page 69. 
 
 11. To find out which are the cheapest foods and which are the most 
 expensive. Page 75. 
 
 12. To study the action of baking powder and yeast. Page 101. 
 
 13. To study the working of a Bunsen burner. Page 102. 
 
 14. To study the principles involved in freezing ice cream. Page 105. 
 
 15. To study the action of some substances used in the kitchen. 
 Page 114. 
 
 To learn the effect of soap on hard water. Page 116. 
 
 To show the effect of light on certain salts of silver. Page 132. 
 
 To study the working of an electric bell. Page 155. 
 
 To learn how the cell used to operate the electric door bell is made. 
 
 Page 158. 
 
 To make a plan for the ornamentation of the home yard. (Late 
 
 winter or early spring.) Pa<*e 167. 
 
10 SCIENCE OF HOME AND COMMUNITY 
 
 21. To make a plan of a flower garden. (Late winter or early spring.) 
 Page 176. 
 
 22. To make a plan of a vegetable garden. Page 187. 
 
 23. To test the seeds you are going to plant in your garden. Page 189 
 
 24. To study the activities of some garden insects. Page 196. 
 
 25. To study some types of bird houses. Page 234. 
 
 26. To study the parts of a steam engine. Page 253. 
 
 27. To see how the motor works. Page 263. 
 
 28. To study the action of the compass. Page 290. 
 
 29. To see how a gyroscope works. Page 292. 
 
 30. To learn why a boat floats. Page 293. 
 
 31. To test foods for adulterants. Page 359. 
 
 32. To observe the effect of anti- toxin treatment for diphtheria on 
 the death rate in New Jersey. Page 377. 
 
 33. To Compare the death rates for various diseases. Page 391. 
 
 34. To study the life history of the mosquito and to find methods o 
 destroying it. Page 404. 
 
 35. To illustrate why we seem to see a continuous set of pictures at 
 the movies. Page 452. 
 
 36. To study the food habits of some common birds. Page 467. 
 
 37. To learn to tell the cuts of wood found in chairs and tables 
 Page 487. 
 
 38. To keep a record of weather conditions by means of instruments 
 Page 512. 
 
 39. To learn how one may foretell the weather by a study of weather 
 maps. Page 513. 
 
 B. Demonstration Projects 
 
 1. To study the principles applied in the hot-air furnace. Page 7. 
 
 2. To study the principles applied in hot- water heating. Page 8. 
 
 3. To learn the source of heat in the steam-heating system. Page 10. 
 
 4. To prepare oxygen and study its properties. Page 13. 
 
 5. To study the composition of air. Page 17. 
 
 6. To learn how the air we breathe out differs from the air we breathe 
 in. Page 18. 
 
 7. To learn the conditions necessary for a change of air in ventila- 
 tion. Page 2 2. 
 
 8. To find the humidity of the room. Page 25. 
 
TEACHERS' HANDBOOK II 
 
 To study the structure and workings of a kerosene lamp. Page 3 7 . 
 
 To test the purity of drinking water. Page 47. 
 
 To show that air has weight. Page 51. 
 
 To study the activities of bacteria and some means of controlling 
 
 them. Page 106. 
 
 To show how to can fruits and vegetables. Page 113. 
 
 To study some of the principles underlying the use of musical 
 
 instruments. Page 124. 
 
 To show how a camera forms images. Page 127. 
 
 To show how to use a camera. Page 131. 
 
 To show how to develop films in the kodak film tank. Page 135. 
 
 18. To show how to print pictures. Page 136. 
 
 19. To illustrate the principle of the dynamo. Page 260. 
 To show how the gas engine works. Page 278. 
 
 To make a simple steam turbine. Page 289. 
 
 To see how the submarine is made to rise and sink. Page 296. 
 
 To illustrate the principle of the balloon. Page 302. 
 
 To show how a set of telegraph instruments works. Page 326. 
 
 To show how the wireless telegraph works. Page 331. 
 
 26. To study the working of the telephone. Page 339. 
 
 27. To see which kinds of water contain the fewest bacteria. Page 351. 
 
 28. To compare the cleanliness of milk from different sources by 
 estimating the number of bacteria in a cubic centimeter (cc.). 
 Page 355. 
 
 To see under what conditions air contains the fewest bacteria. 
 Page 367. 
 
 To see if ice contains bacteria. Page 381. 
 
 To try the effect of pasteurization on the keeping quality of milk. 
 Page 382. 
 
 To show that flies carry bacteria. Page 407. 
 To see if the ventilating system of your school furnishes the essen- 
 tials of good ventilation. Page 432. 
 To test the eyes of the members of the class. Page 438. 
 To illustrate the working of the eye. Page 439. 
 36. To find the height of a hill by means of a barometer. Page 510. 
 
 C. School Projects 
 i. To form a League of Modern Health Crusaders. Page 97. 
 
12 SCIENCE OF HOME AND COMMUNITY 
 
 2. To make the schoolroom attractive by means of house plants. 
 Page 141. 
 
 3. To raise cuttings to take home. Page 143. 
 
 4. To supply the rooms in the school with flowers during the winter. 
 Page 146. 
 
 5. To beautify the school grounds. Page 179. 
 
 6. To raise seedlings of some vegetables in the schoolroom so they 
 may be taken home and planted in your gardens. Page 192. 
 
 7. To put up nesting boxes for birds in the school yard. Page 23; 
 
 8. To make a sanitary survey of the school. Page 442. 
 
 9. To make an exhibit of leaves of trees, to which you may invit 
 your friends. Page 485. 
 
 II. PROJECTS OUTSIDE OF SCHOOLROOM 
 
 A. Home Projects 
 
 1. To make a study of the heating system used in your hoim 
 Page ii. 
 
 2. To learn if your home is properly ventilated. Page 27. 
 
 3. To make a ventilating screen. Page 31. 
 
 4. To make a sleeping porch. Page 31. 
 
 5. To read the gas meter and learn the weekly cost of the gas 
 Page 40. 
 
 6. To read the electric meter and compute the weekly cost of elec- 
 tricity. Page 42. 
 
 7. To read the water meter and compute the weekly cost of water. 
 Page 57. 
 
 8. To store eggs for winter use. Page 77. 
 
 9. To distinguish fresh from stale eggs. Page 77. 
 
 10. To find out if you are eating the right kind and amount of fc 
 Page 87. 
 
 11. To practice daily the proper health habits. Page 96. 
 
 12. To dry fruits and vegetables at home. Page 109. 
 
 13. To can fruits and vegetables. Page 113. 
 
 14. To beautify the home by means of house plants. Page 141. 
 
 15. To raise a Chinese lily for a Christmas present. Page 147. 
 
 1 6. To study the parts of an electric door bell outfit, so as to fix it if it 
 gets out of order. Page 159. 
 
TEACHERS' HANDBOOK 13 
 
 To plant bulbs in the home yard so as to get flowers during the 
 
 spring. Page 1 72. 
 t8. To beautify the home grounds by growing ornamental plants. 
 
 Page 178. 
 
 To raise some early vegetables. Page 192. 
 
 To raise vegetables. Page 200. 
 
 To test different varieties of some one kind of vegetable. Page 201. 
 
 To raise tomatoes for canning. Page 201. 
 
 To raise fall strawberries. Page 209. 
 
 To raise fruits in the home yard. Page 213. 
 
 To take charge of a small flock of chickens. Page 219. 
 
 To make a nesting house for birds to put in your home yard. 
 
 Page 234. 
 7. To feed the winter birds. Page 237. 
 
 To provide water for the birds. Page 238. 
 
 To observe the moon's changes for a month. Page 521. 
 
 B. Community Projects 
 
 1. To investigate local conditions with reference to water, milk, and 
 foods. Page 363. 
 
 2. To study the death rate in your own state and locality for differ- 
 ent diseases. Page 392. 
 
 To see what the class can do to help rid the locality of mosquitoes. 
 Page 405. 
 
 4. To learn what the class can do to help control the fly nuisance. 
 Page 415. 
 
 5. To study the duties of the local health officer. Page 42 5. 
 
 6. To see what the class can do to help protect the valuable birds 
 found in the locality. Page 476. 
 
 7. To learn the value of your city parks. Page 493. 
 
 C. Field Projects 
 
 1. To study those shrubs and vines that are adapted for growing in 
 the home grounds. Page 166. 
 
 2. To identify some of the cultivated flowers and to note their 
 attractive features. Page 177. 
 
 3. To identify the most common weeds found growing in vegetable 
 gardens. Page 194. 
 
14 SCIENCE OF HOME AND COMMUNITY 
 
 4. To see how many birds you can recognize from their son} 
 Page 227. 
 
 5. To see how the locomotive works. Page 253. 
 
 6. To study the parts of an automobile and see how it is 
 Page 282. 
 
 7. To visit the central telephone office. Page 341. 
 
 8. To visit a moving picture theater to see how the projecti 
 apparatus works. Page 451. 
 
 9. To see how many times nestling birds are fed in one day. Page 4< 
 10. To learn what beneficial birds are common in your localil 
 
 Page 468. 
 n. To learn what shade trees are growing in your town and if tl 
 
 are properly cared for. Page 484. 
 12. To learn to name some of the common constellations. Pages: 
 
568N43 
 
 UNIVERSITY OF CALIFORNIA LIBRARY 
 
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