VISUAL AIDS I N CHEMICAL EDUCATION*
IV. Films Available for Use in Chemistry Classes The Committee on Visual Aids in Chemical Education of the American Chemical Society has prepared the following list of films on subjects closely related to chemistry. This list is not long and is far from inclusive of all films which might be classed under some phase of chemistry. However, the committee has attempted in its first report to list those subjects which would interest the larger number of chemistry teachers. All distributors have been given an opportunity to check and correct information regarding films. The list is, therefore, as correct as it is possible to make it up to November 1, 1930. Explanation of the subject matter of films has been omitted, but can be obtained by writing to the distributor. Many of these films are produced by industrial companies, but are not necessarily distributed by them. In some cases, industrial firms (e. g., the E. I. du Pont de Nemours and Company, Inc.) have films distributed through several agencies, many of them the visual instruction departments of state universities. These universities and local agencies have not been listed as distributors, but a letter to the distributor listed here will bring the name of the local agency. The majority of the films in this list are free to the exhibitor, with the understanding that express is to be paid by the user on films to and from the distributing point. One of the greatest sources of annoyance to the distributors is the failnre of exhibitors to return the films on scheduled time. This often works a hardship on the next person scheduled to use the film and results in very unsatisfactory service. Exhibitors, therefore, will find themselves very welcome to use the films if they will show them on scheduled time and return them immediately after using. Another favor the user can show the distributor is to return the films without rewinding. Films are usually inspected by the distributor each time they return to him and should, therefore, come to him in the manner which is of most convenience. Chemistry teachers will also find much more satisfaction in the service if care is taken in the handling of the film while in use. The operator should be taught the correct way to make a neat patch and should be provided with a proper film cement. In addition to the films listed below, The Bray Pictures Corporation (list number 8) has, for sale only, films on the following subjects: Peculiarities of the Air, The Air Pressure in Which We Live, American Matchmaking, An American Vesuvius (Oil), Asphalt, Black Sunlight (Coal), Making Bricks, From Candles to Electricity, How Candy Is Made, Carborundum, Chemical Inspirations, The Chemist Makes War, Spectacular Experiments in Crystallization, Coal, What Is Coal, Coal Mining, Dew-
* This is the fourth of a series of articles from the Committee of the Division of Chemical Education of the A. C. S. on Visual Aids in Chemical Education. See J CHEM. EDUC.. 7, 828--33. 11134, 1341-8(1930). 2916
VoL. 7, No. 12
VISUAL AIDS I N CHEMICAL EDUCATION
2917
fall, Nature's Jewels, The Eighth Wonder (Asphalt), Felt Hat Making. Gold Mining in Alaska, Hard as Diamonds (Carborundum), Experiments in the Conduction of Heat, Natural and Made-to-order Ice, Tapping the Maples, Mining for Beauty (Talcum), A Newspaper in the Making, Romance of Oil, California Oil Gardens, Controlling an Oil Gusher, Converting Wood into Paper, Perilous Occupations, Talcum, How the Telephone Talks, The Destructive Power of T. N. T., Turning Kansas Upside Down (Coal), Turniug Waste into Dollars (Turpentine), Wireless Telephony. These films may be purchased in either 16 mm. or 35 mm. safety stock. The committee has been furnished with several sources of film material, which upon investigation were found to have no films on chemical subjects available. In the accompanying list of distributors we have so indicated this fact so that users may know that these sources were canvassed. In the next issue of the JOURNAL OF CHEMICAL EDUCATION information will be given regarding sources of slides, film-slides, and illustrative material in chemistry which have been collected by the committee. Although the committee does not claim that the list of films given here is absolutely correct in every detail, every effort has been made t o make it so. The committee wishes to thank the producers and distributors of the films listed herein for the fine cooperation they have given, and also express a hope that users of films will report a t any time to the committee chairman additions or corrections which they fmd should be made to this list. Film Distributors and Addresses The distributors marked with an asterisk* do not have chemistryfilmsfor dislribution. 1. ACME EDUCATIONAL FILM SERVICE, 8. BRAY PICTURES CORP..Department 1132-1136 W. Austin Avenue, of Education and Public Service, Chicago, Ill. 729 Seventh Avenue, New York 2. AIR REDUCTION SALES CORPORACity. TION, 342 Madison Avenue. New 9. BUREAU OE COMMERC~AL ECOYork City. NOMICS. 1108-10 16th Street, 3. AMERICAN ROLLING MILL CO., N. W., Washington. D. C. Middletown, Ohio. 10. BUREAUOF MINES, 4800 Forbes 4 AMERICAN TELEPHONE A N D TELEStreet, Pittsburgh, Pa GRAPH CO., 195 Broadway, New 11. BROWN, H. S., 806 S. Wabash York City. Avenue. Chicago, 111. 5. AMERICAN STEEL AN D WIRE CO., 13. CARTER CINEMA PRODUCING CORP., 208 South LaSalk Street, Chicam. 551 Fifth Avenue. New York . 111. City. *6. ATLAS EDUCATIONAL FILM CO. 15. CKURCHAND SCHOOL FILM EX(prodzrcers only), 5 North Wahash CHANGE, 317-8 Polk Bldg., Des Avcnuc, Chicago, 111. Moines, Ia. 7. BAUSCR& LOMECO., 629 St. Paul 16. DE FRENESAN D CO., 60 N. State Street, Rochester, N. Y. St., Wilkes Barre. Pa.
2918
JOURNAL OF CHEMW A L EDUCATION Q. R. S.-DE VRY CORP.. 333 N. Michigan Blvd., Chicago, Ill. DAVIS, H. O., 106 S. Hudson St., Oklahoma City. Okla. E. I. DU PONTDE NEMOURSA N D Co., INC.. Wilmington, Del. EASTMANTEACHING FILMS, INC. (sale only), 343 State Street, Rochester, N. Y. EDITED PICTURES SYSTEM. I NC . (rent only), 130 W. 46th Street, New York City. FILM CLASSIC EXCHANGE, 265 Franklin Street, Buffalo, N. Y. FRANCIS P. GARVANCHAIR OF CHEMICAL EDUCATION, The Johns Hopkins University. Baltimore, Md. GENERAL ELECTRIC Co., 1 River Road, Schenectady, N. Y. GUODYEAR TIRE AN D RUBBER Co., Akron, Ohio. GRINNELL Co., INC., 277 W. EXchange Street, Providence, R. I. HERCULES POWDER Co., Wilmington. Del. INDIANA UNIVERSITY, Bloomington, Ind. INTERNATIONAL HARVESTER Co., GO6 S. Michigan Ave., Chicago, Ill. IOWA STATE COLLEGE. Visual Instruction Service, Ames, la. NATIONAL MOTIONPICTURECo., Indianapolis, Ind. OHIO STATE DEPARTMENT O F EDUCATI~N B., A. Aughinbaugh. 68 E. Paterson Avenue. Columbus. Ohio. PORTLAND CEMENT ASSOCIATION, 33 West Grand Avenue. Chicago, 111. ROTHACKER FILM CORPORATION, 113-115 W. Austin Avenue. Chicago, Ill. ROWLAND ROGERS PRODUCTIONS, 74 Sherman Street a t Harris Avenue, Long Island, N. Y. SOCIETY OF VISUAL EDUCATION. 327 LaSalk Street, Chicago. Ill.
DECEMBER, 1930
SPENCER LENS Co., 19 Doat Street, Buffalo, N. Y. STANDARD M O T ~ PNICTURES Co.. Film Building, Cleveland. Ohio. Swmr AND Co., Union Stockyards. Chicago. Ill. YALE UNIVERSITY PRESS FILM SERVICE, I NC., 386 Fourth Avenue. New York City. MOTIONPICTURE BUREAU OF TAB NATIONAL COUNCIL OP THE Y. M. C. A.. 120 W. 41st Street. New York City; 300 W. Adams Bldg.. Chicago. Ill. UNIVERSITY OF WISCONSIN. Madison, Wis. WESTINGHOUSE ELECTRIC Co., East Pittsburgh, Pa. WHOLESALE FILMS. 42 Melrose St.. Boston, Mass. W. M. WELCH MANUFACTURING Co., 1515 Sedgwick St., Chicago, Ill.
NATIONAL CASH REGISTER Co.. Main and K Streets, Dayton, 0. J. ALEXANDER LEGGETT CO., 2 West 46th Street, New York City. AMERICAN SUGAR REFININGCo.. 117 Wall Street, New Yark City. IDEAL PICTURES CORPORATION, 26 E. 8th Street, Chicago. Ill. EDISON STORAGE BATTERY. Orange. N. J. U. S. DEPARTMENTOP AGRICULTURE, Washington, D. C. SPIROFILM CORPORATION. 161-179 Harris Avenue, Long Island City, N. Y. CHILEAN NITRATE OF SODA EDUCATIONAL BUREAU, 57 William Street, New York City. FRUIT OF THE LOOM MILLS, INC., 40 Worth Street. New York City. VISUGRAPHICPICTURES. INC., 247 Park Avenue, New York City. PICTORIAL CLUBS, INC., 808 S. Wabash Street, Chicago, Ill. UFA FILMS, INC..1540 Broadway. New York City. C. L. VENARD, 702 S. Adams Street. Peoria. Ill.
VOL. 7. No. 12
VISUAL AIDS I N CHEMICAL EDUCATION
62. T m CORTICELLISILK Co., 136 Madison Avenue, New York City. 63. BELDING HEWINGWAYCo., 180 Madison Avenue. New York City. MOTION 64. CANADIAN GOVERNMFNT PICTURE BUREAU,Ottawa. Canada. 65. CHICAGOFILM LABORATORY, INC.. 666 Lake Shore Drive, Chicago, Ill.
CLAY PRODUCTS ASSOCIATION. Chicago. Ill. 67. AMERICANDnu MILK INSTITUTE, Chicago, Ill. 68. THE BALL BROTHERS, Muncie. Ind. 69. INTERSTATE IRON AND STEEL CO.. Chicago, Ill. 70. Gas PRODUCTSASSO~ATION, Chicago, 111. 71. LINK BELT Co.. Chicago, Ill. 66.
Films Classified According to Subjects No. Rrrlr
Slock Sof. Inf
16
35
Dialvibutors Pvec (Unless otherwise drrignolcd)
A hrasives Age of Speed Jewels of Industry Manufacture of Abrasives (Carborundum Aloxite) Story of Abrasives (Carborundum Alorite)
Both 10 Both
I
Alcohol Chemical Ethyl Alcohol
Both
Alunzinum Chemical Effecb of Electricity Magic Gems-Prisma Making Wear-Ever Cooking Utensils
16 (20 Sale) 35 22 Both 42
Asbestos Asbestos for 1000 Years Story of Asbestos Story of Asbestos
35 1 Both 10
Atmosphere Air Atmospheric Pressure Compressed Air Liquid Air Liquid and Compressed Air Science a t Home Bakelite Story of Bakelite Batteries Application of Chemistry (Manufacture of Storage Battery) Making an Edisan Storage Battery
2919
16 35 16 16 Both 35 35
16. 42
(42 Rent) 35 (42 Rent) (20 Sale) (20 Sale) 25. 43 (21 Rent) M(21 Rent)
2920
JOURNAL OF CHEMICAL EDUCATION No.
Reels
Portable Electricity Story of a Storage Battery Story of a Storage Battery
Stock
Sof.
Ini.
16 35
16 35 Both 35
DECEMBER, 1930
Distributors Frea (Unless olhcrrirc dcripnoled)
42, 49 42, 49, 52 (8 Sale) 10 29
Calcium 42 30 (20 Sale) 61
Enamelware From Mine to Wall Limestone to Marble 10 Years of Limestone
Carbon Acres of Diamonds Anthracite Coal
A Rush for Diamonds Behind the Pyramids Bituminous Coal Buried Sunshine Burning Questions Carbon Monoxide, The Unseen Danger Coal Mining (Surface) Fertilizer from Coal How a Lead Pencil Is Made Industrious Diamonds Modern Coal Mining Romance of Anthracite Saving Coal a t Home Story of Coal Strip Mining Wonders of Anthracite
Cement A Concrete Example Cementing the Centuries Concrete Facts Manufacture of Universal Atlas Portland Cement Story of Portland Cement
Clay Products Craftsmanship of Stucco Texture Fire-Clay Refractories From Clay t o Pavement Makina . Lenox Pottery Making Pottery Manufacture and Use of Face Brick
42 (20 Sale) 16 Both Both 35 42 (20 Sale) 16 Both Both Both Both (43 Rent) 35 35 35 49 35 42 35 1 35 (21 Rent) 35 10 35 35 Both 35 Both 35 35 Both 35 Both 65 10 1, 53 31, 42 (18 Rent) 48
VOL. 7,No. 12
Subject
VISUAL AIDS I N CHEMICAL EDUCATION NO. Name of Film
Romance of Clay Sand and Clay-Rock Tableware Terra Cotta The Lenax Pottery The Potters Wheel The Pottery Maker
Soil Cycle
Reels
Slork Soj. Inf.
I6 35
2921
Dirlributara Frcc (Unless arhwwisr dcrignoled)
35 16 16 Both Both Bath Both
66 (20 Sale) (20 Sale) 42 49 25 (31 Rent) (20 Sale) 42
S S
16 35 35 Both 35 16 35 35 35
1 2 1 1 2
S S S S S
Both Both Both Both Both
30 56 56 56 56
1 1 1
S S S
19 19 19 19 53 19 19 53 19 19, 61
1 1 1 1 1 1 1
S S S S S
Copper Chemical Effects of Electricity Copper Mining and Smelting Copper Mining a t Anaconda, Mont. From Mine to Consumer Long Drawn Out (Wire) Mining and Smelting of Copper Mining a t Calumet and Heda Refining and Manufacturing of Copper Story of Copper 5 Reels Mining 2 Reels Milling Smelting-1 Reel Refining-2 Reels Crop Production Alfalfa Corn, Greatest of Our Farm Crops Fertilizing Wheat Producing Profitable Corn in the South Producing Profitable Cotton Erplosives Blasting the Water Highway of America Building New York's Newest Subway Driving the Cascade Tunnel Dynamite Dynamite, Concentrated Power Dynamite in Quarry Work Dynamite the Master Lumberjack Rxplosives-Dusts From Forest t o Farms Green Valley Hydro-Electric Power Production in the New South Letting Dynamite Do It Manufacturing and Testing of Smokeless Powder Manufacture of Progressive Burning of Smokeless Powder Manufacture of Smokeless Powder Modem Quarry Blasting Ruhhing the New Aladdin's Lamp
1 1 12 2 1 1 2 2 10
S S
s S S S
1 42 42 (20 Sale) 1 42 10,35
1 1 1 2. 1 2
S
S S S S
35 Both Both 35 35 35 35 35 35 Both
2 1
S S
Both 19 Both 19.31
4
S
Both 19
F
1 1 1 1
s
2922
Subject
JOURNAL OF CHEMICAL EDUCATION
DECEMBER. 1930
Name af Film
Story of Dynamite The Legacy The Modern Hercules
35 10.19 Both 19, 31, 61 28,29,42 35
Foods A B C of Food Across Seven Seas (Tapioca) Better Bread Better Milk Chemical Composition and Food Value of Whole Wheat
35 (21 Rent) Both 49 Both 67 Both (21 Rent) 35 16 Both 35 35 35 16 35 35 35 35 35 35 Both
Corn Crystals of Commerce Familiar Foods from Foreign Lands Filling the World's Cereal Bowl Food From Wheat t o Bread Home Builders Keeping Out Bad Food Land of Cherries Leavener of Life Leavening Making Malted Milk Making Maplc Sugar Meat Packing Milk Milk as Food Milk, Nature's Perfect Food Milk, the Great White Way to Health Once Over and It's All Over Peanuts Power Behind the Orange Power Farming in the Northwest Power Farming in the South Staff of Life Sunshine The Horseless Farm Uncovering Earth's Riches Wisconsin Dairics
General Chemistry Asphalt Blocks Chemical Effects of Elcctiicity Chemistry Energy from Sunlight Experiments in Chemistry Fire and Heat Fire Prevention (Oil-Volatilc Liquids) Fire Prevention Fire Protection Fire Safety
35 35
Zor 1 2 1 1
S S S S
1 1
S
S
1
1 1 1
S I
S
4 1 1 1
S S
S
36 (20 Sale) 35 (22 Rent) 35 (21 Rent) (13 Rent) (20 Sale) 30.42. 65 48, 53 29, 30, 31, 42, 43, 65 35 29 43 (21 Rent)
(21 Rent) 30 (21 Rent)
16 (20 Sale) 35 30. 29, 31, 42, 43, 65 35 30. 65 35 30.65 35 (21 Rent) Both 35 29, 30, 42, 65 35 21. 30, 65 35 16 (20 Sale) Both 16 35 16 35 16 35 16 16 16
42 (20 Sale) 43 (20 Sale) 48 (21 Rent) I
(20 Sale) (20 Sale) (20 Sale)
VOL.7, NO. 12
VISUAL AIDS I N CHEMICAL EDUCATION
The Grinnell Sprinkler Head Making of Chewing Gum Making Thermometers Mysterious Forces The Science of Buhhles Wheels of Progress or Developmmt of Road Building Glass American Bottles-Old Glass Blowing Romance of Glass
and New
Romance of Glass Sand and Clay The Magic Jar Gold Acres of Diamonds and Miles of Gold Dredge Gold Mining Gold Nuggets of Gold
Hydrocarbons Doings of Terp and Tine Magic Flame Modern Oil Refining Oil Oil, the Wood Preserver Oil Tydings Petroleum Industry Producing Crude Oil Refining Crude Oil Romance of Oil Story of a Rotary Drilled Oil Wcll Story of Gasoline Story of Lubricating Oil Story of Lubrication Story of Natural Gas Story of Petroleum Story of Petroleum Story of Turpentine Through Oil Fields of Mexico World Struggle for Oil H3'drogen Beyond the Microscope Irolz and Steel Arteries of Industry Blue Center (Wire Cable)
35 35 35 16 35
35 16 16 35 35 16 Both 35 35 16
35 Both 35 35 35 35 35 16 16 . 35 35 35 35 35 35 35 35 35 Both
10 35 35 Both
2923
27 48 29,36 (21 Rent) 48 (18 Rent) (18 Sale)
Owens Bottle Co (20 Sale) 68 29, 42, 43, 68 51 (20 Sale) 42, 68 42 1 (20 Sale) (18 Rent) 28,31,42 70 31 (43 Rent) 51 (18 Rent) 42 42 (18 Rent) (20 Sale) (20 Sale) (21 Rent) 10 1,10,29 10 10 1
1.29 10 29 10
25 1, 29, 31, 43 (21 Rent) 42 42
2924
Subjecl
JOURNAL OF CHEMICAL EDUCATION
Name of Film
Continuous Process of Making Iron and Steel Sheets Iron and Steel Iran and Steel Iron and Steel Industry Iron Ore to Pig Iron Laying of Electric Cable across San Francisco Bay Making It Tough Making of American Wire Rope Making of Steel Making of Steel and Wire Making of Steel Pipe Manufacture of Paper Insulated Power Cables Pig Iron t o Steel Rolling Steel by Electricity Something New under the Sun Speeding Production with Carboloy Steel for Sheets and Tin Plates Steel Industry Story of Alloy Spring Steel Story of Alloy Steel Story of Heat Treatment of Steel Story of Ingot Iron Story of Iron Story of Steel Story of Steel Story of Steel Story of Steel Mining and Metallurgy-2 Reels Rails, Rods, and Plates-1 Reel -1 Reel Wire Products 1 Reel Lap-Welded Pipe Sheets and Tin Plates 1 Reel Story of Steel and Wire Products Story Your Ink Battle Tells Uses of Wire Rope Lead Chemical Effects of Electricity From Pies to Paint Lead Story of Lead Mining and Milling Story of Lead Smelting Leather American Glove Craft Menufacture A Day with the Tractor Builders
No.
D~csnwea.1930
So/
Rcels
In/.
4or2
S
Both 3 35 29 35 48 35 31 (18 Rent) 35 16 (20 Sale)
5 35 16 (20 Sale) 35 1 Both 25 Both 58
35 10 35 1.42 35 42 Both 5 Both 10
16 35 16 35
Bath
(20 Scale) 42 (20 Sale) 10
16
VoL. 7. No. 12
svbjerr
VISUAL AIDS I N CHEMICAL EDUCATION
Nomr of ~ i l m
N O.
~
d
Stork Snf.
r
16
35
2925 Di5lribula"s
Fvec 1Unlerr o l h n l u i ~ c dcsignded)
Building Quality into Cream Separators 2 The Making of Twine
Matches Fire Making Liquid Fire Science in the Home Story of a Lucifer Match
16 (20 Sale) Both (60 ~ e n t ) 35 31 35 (21, 50 Rent)
Nickel Mining Nickel and Copper Ore Monel Metal
35 Both
Nitrogen The Chilean Nitrate Industry Farm for Sale Refrigeration Silica Gel (Refrigeration)
Both 5G 35 61 16 (20 Sale) Both 42
43 35
Oxygen
Chemistry of Comhustion Conduction of Heat. Chemistry of Combustion Explosive Dusts Fire Making Magic Flame Oxygen Breathing Apparatus Oxygen the Wander Worker Steam Power (Mechanical Stoker) Stoker Combustion
35 35 35 16 Both 35 35 16 35
43 (22. 46, 59 Rent)
43 1.53 (20 Sale) 70 10 2, 10.42 (20 Sale) 43
Paints Lacquer and Pearls (Japanese Crafts)
Both 60
Paper A Day with the Sun Forest to Newsboy From Trees to Tribunes From Tree t o Newspaper Miracle of Mulch Paper Miracles of Mulch Paper Modem Paper Making Paper Making The Voice of Business Wall Paper the Beautiful World of Paper
Both 35 35 10 Both 35 16 35 35 Both 35
Rubber Conquering the Jungle Romance of Rubber Rubber
42 48 31.42 (20 Sale) 31, 58 43 16 29 42 42 25.29
Both 26, 30 16 35 35 42.35 16 (20 Sale)
2926
DECEMBER. 1930
JOURNAL OF CHEMICAL EDUCATION No. Resir
Rubber Industry Rubber of Yesterday Story of a Tire Story of Rubber Where They Go Rubbering
S1mk
Sof. Inf
16
Dirlribulorr Frca (Unlcrr alhrrwisr
35
drsianulrd)
29 35 35 1 Both 26 16 16 35 31.48
Salt Common Salt Crossing the Great Salt Desert Ocean Tears Pillars of Salt
16 35 35
(20 Sale) 43 48
Salt Mining
Silver Art of the Silversmith I See You Calling Me Pictures by Wire Silver Silver: Heirlooms of Tomorrow Silverware (Plating)
Both 10 4 35 35 4 16 (20 Sale) Both 10 48 35
soap Science of Soap Bubbles Soap
Sugar Beet and Cane Sugar Beets from Seed to Sugar Bowl Cane Sugar Cuba-The Island of Sugar Maple Sirup and Sugar Sugar Cane and Cane Sugar Sugar Industry Sugar Refining The Sugar Trail-"Beets"
Sulfur Experiments in Sulfur Story of Sulfur
35 16
(59 Rent) (20 Sale)
16 35 Both Both I(:
(20 Sale) 53 42 25 (20 Sale)
35 35 Both
29 50 1, 25
35 (59 Rent) Both 1,10,29,31,35(4GRent)
Textiles Civilizations Fabric (Cotton) Cotton Growing Cotton Goods From Cocoon t o Spool
Both 16 16
57 (20 Sale) (20 Sale)
From Flax t o Linens Golden Fleece Making of Twine
16 (20 Sale) Both 60 35 42
VOL.7. NO. 12
VISUAL AIDS I N CHEMICAL EDUCATION
16
Philippine Islands (Hemp) Romance of Rayon Romance of Silk Silk Silken Cocoons Story of Chase Velmo Story of Cotton Trip through Filmland
(20 Sale)
16 (20 Sale) Both 60 Both 42 Both 42 Both 10
L'alwcs Both 10
Open and Shut
Water A Modern Sewage Treatment Plant Chemical Inspirations (Crystallization) Conowingo (Construction of HydroElectric Plant) Frazil Ice Irrigation
2 1 1
S
Mysteries of Snow and Ice
1
Nature's Frozen Credits New York's Water Supply Purifying Water Sewage Disposal Water Water Cycle Water Power Water Power Waste Disposal in Cities Wonderlul Water (Natural Colors) Work of Underground Water
3 1 1 1 1 1 1 2
I S S S
S S
s
s
S S S S
1
I
1 1
I
Beyond the Microscope
1
S
Chemical Effects of Electricity Electro Chemistry Secrets of Chemistry
1 1 1
S S
S
Both 35 16 35 35 35 35 16 10 16 Both 16 16 35 35 35 16
42 64 (20 Sale) 29 48 (43 Rent) (8 Sale)
42 (20 Sale) (20 Sale) (20 Sale) (42 Rent) (20 Sale) (20 Sale) 10, 31 31 (22 Rent) (21 Rent)
Zinc Laying the World's Fastest Ocean Cable (Permalloy) Manufacturing of Zinc Oxide Story of Zinc Mining Zinc Mining, Milling, and Smelting
Theory
Sound Pictures Cosmic Ray by R. A. Millikan
I
16 35 16 16 35
25 1, 29, 31, 43 (20 Sale) 20 (22 Rent)
2927
