HIGH-SCHOOL NOTES ELBERT C. WEAVER Bulkelq High School, Hartford, Connecticut
SCIENCE PROJECTS R. W. WOLINE Community High Schwl, Gillespie, Illinois
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HE use of projects and other supplementary materials is often helpful in the teaching of sciences. The author has used projects and supplementary reading reports for the past two years and has found them to be of some value. Their use has not proved to be the "cure-all" that many claim them to be. However, experience has proved that this sort of material is helpful in teaching some students. The list of projects and reading reports which folfow contain topics which have been compiled during the past two years and also lists the instructions given to the students. No claim is made for orieinalitv.. as the material was compiled from sources too numerous to mention, and while the list is far from complete it is offered with the hope that it might provide a source of ideas for supplementary materials. ~
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OPTIONAL WRIlTEN REPORT?
The topics listed on the next few pages are suggested as material which can be used to raise your grade, increase your knowledge, and to provide work for the ambitious student. These reports are to be written in ink, or typewritten, and must be approximately four hundred words in length. They should show that you have done some additional reading, or research, on the topic chosen. Credit will be given for these reports by using the grade given on the report as a factor in determining your six-weeks grade. If you wish to secure more credit than this you may use any of these topics as a Research Topic. See the Rules for Research Topics. Reading . Reports may NOT be substituted for a Project. Research Topics MAY be substituted for a Project. RESEARCH
(1)
Topics must be chosen from posted list. Exceptions granted only after consultation with instructor. ,(2) All research must be completed by April 30.
Reports of research will comprise the following divisions: ( A ) Thesis or Paper (Minimum two thousand words) (1) Divisions of Thesis. (a)Cover. (6) Title page. i,d, Table of contents. (d) Written account of work. (e) Bibliography. ( B ) Drawings, Diagrams, Pictures, Displays, and so forth. (1) Should you desire drawings, diagrams, and pictures, they may be distributed through the thesis. (2) It is almost necessary in research of this kind that you prepare, whenever possible, .your own diagrams, models, and materials. (4) Papers and all research materials need not be in duplicate unless you want t o keep a copy. Must be in ink or typewritten (double-space). ( 5 ) Research work will be substituted for one-half or all of the second semester examination according to type of work done. (6) Any student neglecting his daily wmk for research will be requested to drop research until daily work is satisfactory to instructor. (7) Research is open to Chemistry and Physics students only. Some exceptions may be made in General Science. (8) You mud consult instructor to secure his approval before starting a research topic (This is not necessary for a reading report.)
(1) (2) (3) (4)
(5) (6) (7) (8) (9) (10) (11) (12) (13) (14)
Abrasives. Alchemy. Alloys. Aluminum. Atoms. Anaesthetics. Atomic models. Asbestos. Bacteria. Bakelite. Baking (pastries, cookies, cakes. and so forth). Baking powder. Bewrages-carbonated. Bleaching.
(15) (16) (17) (18) (19) (20) (21) (22) (23) (24) (25) (26) (27) (28) (29) (30) (31) (32) (33) (34) (35) (36) (37) (38) (39) (40) (41) (42) (43) (44) (45) (46) (47) (48) (49) (50) (51) (52) (53) (54) (55) (56) (57) (58) (59) (60) (61) (62) (63) (64) (65) (66) (67) (68) (69) (70) (71) (72) (73) (74) (75) (76) (77) (78) (79) 180)
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(82) (83) (84) (85) (86)
Candy, Chemistry of. Candy, Coal tar dyes in. Carbon. Carborundum. Ceramics. Cement. Cellulose. rayon, artificial silk. Chewing gum. Coal. Coal tar. Coal tar products. Cocoa. Colloids. Corn products. Cosmetics. Dentifrices (tooth paste). Duco. Digestion, Enzymes aiding process of. Electrolytic refining of metals. Edible ails, Hydrogenation of. Fireworks. Fertilizers. Fire extinguishers. Flavorings and extracts. Food adulterations. Gasoline. Glass. Glue. Glycerine. Graphite. Hydroelectric plants. Illumination. Relation of chemistry to. Industrial poisons. Inks. Iron. Lacquers. Laundering. Lead. Leather. Linoleum. Lime and limestone. Liquid fuels-iaolid. Lubrication, Some problems of. Matches. Medicine. Nitrogen. Paints. Pens. C Pencils. Perfumes. Petroleum. Photoelectricity. Photography, Chemistry of. Plants, Chemistry of. Pottery. Precious stones, imitation and artificial. Patent medicines. Potash, Supply of. Radio. Road construction. Rubber. Silk. Sewage disposal. Soap. (Cf., Sch. Sci. Math., 38, 393 (Apr., 1938)). Stains. Steel. Sugar. Telephone. Television. Thermite. Textiles. Water purification.
(88) (89) (90) (91) (92) (93)
War gases. Vitamins. Zinc. Radium, Curies, and medicine. Diabetes, and treatment. Heavy water. (Cf., Sch. Sci. Math., 37, 1034 (Dec., 1937)). READING OR RESEARCH TOPICS (PHYSICS)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) 118) ,(19) (A,) ('21)
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Aircraft and their engines. Aircraft and their construction. Atmosphere, Pressure of. Aurora borealis, Electrical effects of. Artificial lightning. Batteries and power. Caissons and cofferdams. Change of state. Compressed air machinery. Death rays. Electricity, Heating effectsof. Electrons. Electromagnetism. Electrochemistry. Energy and power. Fluid pressures, Transmission of. Friction, How it may be decreased. Heat from fuels. llrat from ihe stars. I l n 1 ~and the structural enginctr. lnavdihlc sounds Lenses-microscopes. Invisible light. Illumination and its measurement. Lighter-than-air machines. Liehtnine " " Rods. Their present-day use Light waves and color. Magnetism. Molecules and their behavior. Optical instruments. ., Percussidn and destruction of bridges and buildings. Radium and energy. Engines. Steam Engines, Gas. Engines, Oil. Simple machines of the ancient? Stars and their composition. Strings and air columns in music. Sun engines (Gobi desert). Telescapes-construction and operation. Thermal power. Vacuum tubes and radio communication. Water power. X-rays and life. Long range guns. Tanks-Operation and usefulness in war. SubmarinesSources of power. Automatic stokers. Smoke prevention. Harbor protection. Mine machinery and its operation. Some problems in mine ventilation. The application of power and energy in mines. Air-conditioning. The story of the standard meter. Gold beating and gold beaters' skin. Story of the Keokuk, The Roosevelt, The Muscle Shoals or some other irrigation or power dam. Particular attention is to be given t o the engineering rather than the historic features. A history of the development of weights and measures The history of the Westinghouse air brakes. Sinking the piers of a bridge. ~
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(61) (62) (63) (64) (65) . , .(66) (67) (68) (69) (70) (71) ,(72) (73) (74) (75) (76) . . (77) (78) .(79) (80)
(81) (82) (83)
Compressed air coal-mining machinery. Making liquid carbon dioxide. The Foucault Pendulum experiment. The centrifugal cream separator; its construction and manner of operation. Historv of aviation includinr the fliehts of Prof. S. P. angle; and of the right- rot he& a t Kitty Hawk, North Carolina. History of the steam engine. History of internal combustion engine. History of the bicycle. History of the automobile. History of turbine water wheels. Write about a trip to a liquid carbon dioxide plant or a plant where liquid air is made. The making of a thermometer. See pamphlet issued by the Taylor Instrument Company. Make a written report on a trip actually made to a plant where artificial ice is made. The nature of gases. See "Concerning the Nature of Things," by Sir William Bragg, Chapter 11. Treatment of walls of auditoria with sound-absorbing materials. Rieht- and left-handed suear (dextrose and levulose). A study of the use of the polariscope in the sugar and allied industries. History of electric lighting-Encyclopedia. Source of the sun's light and heat. Any up-to-date advanced astronomy text. . "Rings around the Moon and Sun." See "Concerning the Nature of Things." Twilight and its causes. See "Astronomy" by Young. The followine seven lessons are from "Liehtine Sales Course," pubyished by the National ~ l e c t r i c ~ i g Assohf ciation. Illumination. Principles of illumination. Residence lighting. Store lighting. Office and public building.lighting. - Industrial lighting. Outdoor lighting. Magnetism, terrestrial. New International Encyclopedia. Terrestrial influence of sun-spots; magnetic storm. See "Astronomy" by Russell-Dugen-Stewart. p. 209. History of electric railway systems. History of the incandescent lamp. Description of the Edison three-wire swtem of electric distribution. History of the invention of the electric motor. Write a paper showing the essential differences between the direct current, the single phase, and the three-phase alternating current electric motors. Write a paper setting forth briefly the specific contributions of James Clark Maxwell, Heinrich Rudolph Hertz, Guglielmo Marconi, Lee DeForest and Major Armstrong in the development of radio transmission. Write a paper showing the specific contributions of Antoine Henri Becquerel, Madame Curie, and of E. Rutherford in the discovery and development of radioactivity.
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MISCELLANEOUS
(1) Thirteen-month calendar. (Cf., Sch. Sci. Math., 38, 575. (May, 1938).) (2) Extinct birds or those on the wane, with emphasis on conservation. (3) Thermometry. (Cf.,J. CHEM.Eouc., 11,448 (Aug.,1934).) PAMOUS SCIENTISTS
The following list contains names of people that have made a n important contribution in some field of science. A biographical report on any of these will he worth while.
Rules for these reports are the same as for Reading or Research Topics. BIOGRAPHIES
(1) Blaise Pascal. (2) Robert Hooke. (3) Archimedes. (Cf., Iowa Science Teacher, 4, 51 (May, 19RYI
(4) Evangelists Toricelli. (5) Galileo Galilei. (6) Sir Isaac Newton. (CJ., Iowa Science Teacher. 4, 77 (Sept.. 1938).) (7) lean Bernard Leon Foucault. Prof. S. P. Langley of the Smithsonian Institute. Orville and Wilbur Wright. Thomas A. Ediron Henry Ford. James Watt. Lord Kelvin (Wiiliam Thompson). Tames Dewar. (15) kobert Boyle. (16) John Tyndall. (17) H m a n Ludwig Ferdinand von Helmholtz. (18) Christian Hygens. (19) Henry Augustus Rowland. (20) Augustin Jean Fresnel. (21) Thomas Young. (22) William Gilbert. (23) Joseph Henry. (24) Samuel B. F. Morse. (25) George Simon Ohm. (26) Andd Marie Ampere. (27) Allessandre Volta. (28) James Clark Maxwell. (29) Heinrich Rudolph Hertz. (30) Guglielmo Marconi. (31) Lee DeForest. (32) Major Amstrong. (33) Antoine H m i Becquerel. (34) Madame Curie. . (35) E. Rutherfdrd. (36) Albert Einstein. (37) Gauss. (38) RALPH E. DUNBAR,"Historical materials in college general chemistry textbooks," J. CHEM. EDUC.. 15, 181-6, (Apr., 1938),has a vely long list of names.
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SCIENCE PROJECTS
(A) Repired of each student. (B) Must be permanent, requiring considerable time and labor to make. (At least twenty-five hours.) (C) Will not be returned. (With few exceptions.) These are to be considered as your permanent, and tangible. donation to the Science D e p ~ t m e n t . The better ones may he placed on display. (D) . Due on the last day of April. (E) Credits: Project will be one-half of last six weeks' grade. More credit may he given a t the discretion of the instructor. (F) If you have some worth-while project of your own, you may use it instead of one of those listed. (G) Two or more students may work on some of the projects. (H) Secure instructor's approval before you start on a project. (I) If you have any questions, please see instructor.
(1) "Newspaper Clippings" required of all students unless you One thousand column inches and one do a ~roiect. . . 1 Instruction sheets may he secured from The Illinois Chemistry Teadcr for marked items.
hundred articles of a scientific nature. Pictures and magazine articles will count one-half of their length. (2) Steam engine, 1 kg. cm./sec. power, or open, cut away, model. (3) Short wave receiver, 1 tube. (4) Short wave transmitter, 1 watt. (5) Radio set, 2 tube. (6) Weather forecasting, four and one-half months. (7) Travel bwk: twenty-five pages, twenty-five pictures. At least three maps desired. Specialize in three major localities. (8) Sun dial. Permanent, accurate. Diameter over ten inches. (9) Library reading: One thousand pages of approved science material (not over two hundred pages from periodicals, biographies, and so forth). Ten-page report with five illustrations. (10) Sextant, usable. (11) Telescope and magnification determination. (12) Balloon (twenty-four inch) or.Dirigible (thirtyaix inch) Model (HI furnished). (13) Generator or motor-(power-1 kg. cm./sec.). (14) Pin-hole camera and pictures it has taken. (15) Two-way telegraph outfit. Also must know code. (16) Coal mine model with a t least five samples. (17) B i d house (showing twenty-five hours of work). (18) Fossil collection (five) labeled and classified. Describe place where found. (19) Insects (twenty-five) (mounted-labeled) both common and scientific name. ' (20) Seeds (twenty-five) must be from one of the following groups: (a) Vegetables, (b) Grain, (c) Weeds. (21) Skulls (a) five skull-ne from each major class of vertebrates (mounted and labeled). (b) Large skull mounted with all bones and fissures (labeled). (22) B u t t d y pictures: Five types of b u t t d i e s mounted behind glass. Neat. Labels on back of picture. (23) Bird egg mounts: Mold by using day, wax, wood, and so forth, and exact model of (ten) hird eggs; color, size, shape correct. No wild bird eggs accepted. (24) Vegetable experiment garden: Takes two to three months research and data on such problems as the following: (a) Depth in planting seed. (b) Quantity of moisture. (c) Kinds of fertilization. ( d ) Cross-pollenization. Each plant must be examined; and its size and condition reported. One or more graphs included. (25) Flower garden: Same as above, on@ using flowers. (26) Qualitative analysis. Two to five salts given as unknowns. Chart showing procedure and results. (27) Quantitative analysis. Problem given by instructor. Chart showing procedure and results. TAB LESS TAE ERROR lTG4 BETTER THE GRADE. (28) Periodic chart. (29) Research or thesis (see list of acceptable topics). (30) Scale drawing of laboratory. (31) Cabinet to hold road maps. (32) Most Boy Scout Merit Badges. (33) Most Girl Scout Merit Badges. (34) Chemical map. (35) Frasch process models. (36) Chart or collection of coal tar products. (37) Chart showing steps in manufacture of dyes. (38) Chart or collection of petroleum products. (39) Chart showing steps in manufacture of photographic films. (40) Chart showing steps in developing pictures. (41) Model of water works plant. (42) Model of sewage disposal plant. (43) Model of Bessemer process. (44) Chart of Bessemer process. (45) Model of contact sulfuric acid process. (46) Chart of contact sulfuric acid pracen.
(47) Scheme t o show activity of halogens. (Cf., Science Leaflet. 11. 36 (Oct. 21. 1937).), Liquefy various gases as SO,, NHI, and so forth. (Cf, ibid.. 11, 36 (Oct. 21. 1937).) Make notebook of science radio programs. Make several atomic models. (Cf., J. CHEM.Eouc., 16, 102 (Apr., 1938) and ibid., 13, 564 (Dec., 19361.) Make a set-up to show series and p&llel circui'ts. Leaf collection (twentv-five different leaves mounted) (53) Construct a Wheatstone bridge. (Cf., Ill, Sci. ~ e a c h e r , 16 (Feb.. . . 1938).) (54) Makea miniaturegeyser. (Cf., ibid., 16 (Dee., 1937).) (55) Make a collection showing how metric system is used in business world today. (56) Weigh an auto or truck by inking tires, putting impression on paper and calculate weight of truck or auto by using the proper mathematical formulss. (57) Make a radio set which will receive. (58) Make an astronomv umbrella. (59) Tesla coil. (Cf., Sih. Sci. Math., 38,493 (May, 1938).) (60) Model airplanes. (61) Indicator chart (for chemistry). (62) Telescopes. (63) Geological time maps. (64) Geological area maps. (65) Leaf margin collection. (66) Insect gall collection. (67) Cellophane leaves. (68) Collect hird pictures. (69) Photographs of laboratory apparatus set-ups. (Cf., J. CHEM.EDUC..11,546 (19341.) (70) Diagrams of laboratory apparatus set-ups. (71) Fractional distillation of crude oil. (72) Chart of a coal mine. '(73) Vitamin project. '(74) Artificial stomach. '(75) Observing heredity with the Drosophila fly. '(76) Examination of bacteria in the milk supply. '(77) Analyzing the water supply for bacteria. '(78) Mold cultured cheese. , , .-'(79) Cheddarcheese. '(80) Field study of bird. '181) . . Mountine birds. '(82) Embryos of fish, Kids, and mammals. '(83) Tesring lubrication oil. '(XI) Hydrogrnation of vegerable oils. '(85) Getting sugar from corn. '+ '(86) Rayonsynthetic. '(87) Photography. '(88) Making paint. '(89) Makine ~ l a s t i cwood. '(90) ~ a k i n g~akelite. '(91) Making lime. '(92) Making palish-wax type. '(93) Mirror making. '(94) Electroplating. (95) Testing cloth fibres. '(96) Obtaining and using casein from milk. '(97) Making ink. '(98) Tanning leather. '(99) Crystal growing. '(100) Making models of mineral crystals. '(101) Clay modeling. '(102) Etching designs and photographs on metal. '(103) Fur tanning. '(104) Making h a k i powder. '(105) Dyeing cloth. '(106) Making vanishing cr-. '(107) Making cold cream. '(108) Preservation of food. l(109) Make a poster containing vials of chemicals showing analysis of several brands of baking powders. (110) Effect of difierent chemical fertilizers on plant growth.
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'(111) Make s h w polish. '(112) Make library paste or mucilage. '(113) Make putty or wallpaper cleaner. '(114) Make a museum mount of a bird or an animal. '(115) Electroplate an iron spoon. '(116) Etch glass so as to make a design. (117) Model to demonstrate the relation between kinetic energy and velocity. (Cf, Sch. Sci. Math., 38, 518 (May. 1938).) (118) Construct vacuum pump apparatus. (Cf., ibid., 38, 550 (May, 1938).) (119) Magnetic force. (Cf., ibid., 28, 358 (Apr., 19281.) (120) Density of liquids. (Cf., ibid., 38, 359 (Apr., 1939).) (121) Conductivity of metals. (Cf., ibid., 38, 359 (Apr., 1938).) (122) Common w d s . (Cf., ibid., 38,362 (Apr.. 1938).) (123) Conductivity of solutions. (Cf., ibid., 38, 360 (Apr., 19381.) (124) Mercury vacuum pump. (Cf., ibid., 38, 376 (Apr., 19381.) (125) copper etching. (Cf., ibid., 38,376 (April, 1938).) (126) Water filtration plant model. (Cf., ibid., 38, 454 (Apr., 193%) (127) Diet experimentation (several students). (Cf, ibid., 38. 243 (March, 1938).) (128) Make maps showing course of birds that fly long distances. Secure picture or model of the birds if possible to do so. (129) Fix our model T engine so i t can be operated by an electric motor. (Motor furnished.) (130) Construct a large model elecfric hell which will work. (131) Construct several types of artesian divers. Write a short explanation of the operation of each. (Cf., Sch. Sci. Math., 38, 141 (Feb., 1938).) (132) Make an alphabetical list of scientific A d s found in newspapers or magazines. (250 words.) Be able to use each word correctly. (1331 Make a reflectorbox with lieht - bulbs.. s h i m reflectors and a lens so constructed that one can project textbook pager, photogragbs, postcard pictures, etc.. upon a screen. (134) Make five lantern slides. (135) Plant seed in flower pots and care for flowers. Written report necessary. (136) Forms of calcium carbonate (marble). (Cf., Sch. Sci. Math., 37, 910 (Dee., 1937).) (137) Stamps and Chemistry. (Cf., ibid., 37, 910 (Nov., 1937). and J. CHEM.EDUC.,11,259-66 (May, 1934).) (138) Take pictures of animals or birds, "in the field." (Cf., ScienteLeafEet, 10,l Uan. 7.1937).) ' (139) Make a Microprojector. (Cf., Sch. Sci. #ath., 37, 933 (Nov., 1937) and J. CHEW.Eouc., 15, 16 (Jan., 1938).) (140) Make three improved overllow cans. (Cf, Sch. Sci. Met&., 37, 935 (Nov., 1937).) (141) Construct a constant temperature oven. (142) Construct an oven-no temperature control. (143) Constructs fireless cooker. (144) Make a lever for physics lab. (Cf., Sch. Sci. Math., 37, 977 (Nav.. 1937).) . . (145) Make a large set of weights for lab. (Cf., ibid., 37, 978 (Nov., 1937).) (146) Make a large wheel and axle for lab. (Cf., ibid., 37, 979 (Nov., 1937).) . 14, 581 (147) Make a H2S generator. (Cf., J. C ~ MEDUC., (Dec., 1937)andibid., 13,588 (Dec. 19361.) (148) Model to demonstrate effect of heat an a confined volume to gas. (Cf., ibid., 15, 394 (Aug., 19381.) (149) Make six buret holden. (Cf, ibid.. 15,335 (July, 1938).) (150) Make display cases. (Cf., a i d . , 15,219 (May, 1938).) (151) Periodic system of elements. (Cf., ibid., 15, 180 (Apr., lCl3XI \ ----,., (152) Make a Bakelite plastic. (Cf, ibid., 15,43 (Jan., 193%) (153) "Fix Nitrogen." (Cf., ibid., 14, 73 (Feh., 19371.) (154) Color tone photographic prints. (Cf, ibid., 14, 31 (Jan.. 1937).)
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(Cf., ibid., 13,564 ( ~ e c . ,
Hydrochloric acid plant model.
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Pennutit water softener. (Cf., ibid., 13,564 (Dec., 1936).) Solvay soda plant. (Cf, ihid., 13, 564 (Dec., 1936).) How much HScombines with 16 grams of OX? (Cf, ibid., 13,585 (Dec., 1936) and do the experiment.) Density demonstration apparatus. (Cf., ibid., 13, 589 f~ - . e. Q 1 ., l. ..W .,-, Make 3 COXgenerators. (Cf., ;bid., 13,539 (Nov., 1936).) Make a hot-plate. (Cf., ibid., 12, 336 (July, 1935).) Ultramicroscope. (Cf., ibid., 11, 570 (Oct., 1934).) Oxidize ammonia to nitric acid. (Cf., ibid., 11, 575 (Oct., 1934).) Make an alpha-ray track apparatus. (Cf, ibid.. 11, 576 (Oct., 1934).) Make apparatus to demonstrate electrolytic conductivities. (Cf., ibid., 14, 384 (Aug., 1937).) Test water for impurities. (Cf,, Eap. 11, p. 63, "Workbook and Laboratory Manual in Chemistry," by Jones, Matheas, Weister. College Entrance Book Co., New York, N. Y.) Prepare a chart showing uses of chemistry in the home. Prepare a chart showing uses of physics in the home. Make a hygrometer. Make a hydrometer and calibrate it. (Loaded test-tube works nicely.) Make a gram-molecular volume box. Make collection of oxides. Make collection of sulfides. Make working model of Nelson cell for electrolysis of sodium chloride. Chart to show CO1-Oqcycle. Chart t o show nitrogen cycle. Silver a mirror. Make C02fire extinguisher. Chart showing how to remove stains. Make an activity series chart. Model of Solvay Process. Making a light bulb burn without connecting it to current. (Cf,, S c i n c e Leaflet, 10,36 (Sept. 17,,1936).) Makea telescopemirror. (Cf., i&id., 11,39 (Nov. 18,1937).) Photographs of eight completed projects are on pages 20 and 21, Scienm Leaflet, 11 (Jan. 7, 1937). Diffraction of light. (Cf., Science Leaflet, 11, 19 (Mar. 31, 19381.) Preparation and properties of an alloy. Photographs of four completedprojects. (Cf., Science ' Leaflet, 10, 34 (April29.1937).) (a) Water content of foods. ( b ) Metallic elements. (c) Open hearth process. (d) Bessemer process. Model pasteurization plant. Twophotographs of projects. (Cf., Science LcqRet, 11, 28 (May 5. 1938).) Poisons we eat every day. A.photoelectric cell. (Cf., ibid., 11, 18 (May 5, 1938).) Atlantic City Exhibit of Student Science Clubs of America. Science Lcaflet. 10. 1-5 (Jan. 21, 1937). has several suggestions. Model filter bed. (Cf., ibid., 10,3%36 (Mar. 18, 19371.) Bleaching cloth. (Cf,.,ihid., 9, 39 (Oct. 8, 193%) Electroplating set-up. (Cf., ibid., 11, 34 (Mar. 3. 1938).) Cottrell process of smoke precipitation. (Cf, ibid., 11, 36 (Feb. 3, 1938).) How t o make a reflecting telescope. (Cf., ibid., 11, 33 (Jan. 27, 1938).) Hame-made respirationapparatus. (Cf., ibid., 9, 35 (Dec. 3,1936).) Photographs of exhibit of posters, and so forth, on carbon and its compounds. (Cf., ibid., 9, 10 (Dec. 3, 1936).) Preparation of bromine. (Cf., Oid., 10, 31-38 (Jan. 28, 19371. photograph and description.)
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(201) Making malachite. (Cf., Science Lenflct., 10, 31-38 (Jan. 28, 1937).) (202) Demonstration solvay process model. (Cf., ibid.., 9, 34 (Oct. 15, 19:36), photograph, diagram, and description.) (203) Chart on acetic acid and its uses provides a good sample on this type of project. (Cf., ibid., 9, 14 (Oct. 15, 1936).)
(204) Map of world naming the great scientists in each country. (205) Map of world showing one or more sources of each of the ninety-two elements. (206) Map of the United States showing the location of the physical, chemical, biological, or research laboratories in which outstanding work is being done.
