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Seventh Edition INDUSTRY AND ENGINEERING 49
INDUSTRY AND ENGINEERING
GROUP 64 Electricity Cables
Business in Great Waters (2) Picturing the laying of the fastest submarine cable ever made between Newfoundland and the Azores. (A162)
Features of High Voltage Cable (1) A talk showing progress made in high voltage cable. Samples of various types. (A61, •61)
Laying the World's Fastest Ocean Cablbe Off Newfoundland (2) Incidents filmed during work of connecting England and America. (162)
Laying of Electrical Cable Across San Francisco Bay (1) Self-explanatory. (10)
The Span Supreme (5) Story of manufacture and erection of cables of the Hudson River Bridge. (•170)
Speeding Up Our Deep Sea Cables (2) Camera record of laying of permalloy cable between New York and Azores. (162, 170)
(See also Group 68)
GROUP 65 Radio Listening In (1) How the familiar radio set is put together. (128) The Magic of Communication (1) Spoken word converted into dance of electrons along wires which carry to ear of listener delicate shades of tone. (162) Man-Made Miracles (1) Complete story of manufacture of radio tube.
(A* 160)
Mystery Box (1) Analysis in motion picture photography and animated drawings of basic principles of radio. (920) Wireless Telephony (%) How sound waves are carried by electric waves and re-converted into sound waves thousands of miles from source.
(•20, 164)
The Wizardry of Wireless (2) History of communication; explanation by animated drawings of principles involved in wireless. (*61)
(See also Group 83)
GROUP 66 Telephone and Telegraph
Concerning Crossarms (1) Something about the branches of our trees Of speech. (170)
The Electrical Transmission of Speech (1) Fundamentals involved in transmission and reception of voice over wire circuits. (162, 170)
How the Telephone Talks ( % ) Principles of communication ; details of transmitter and receiver; diagrams and technical drawings. (*20)
The Inside Story of Your Telephone (2) ^Gathering and utilization of 15 of raw products used in manufacture of telephone. (162, 170)
A Name Makes the Rounds (1) Story of telephone installation. (170)
Now You're Talking (1) An animated cartoon illustrating harm that may result from improper handling of telephone. (170)
Pictures by Wire (1) Explanation of sending of pictures over telephone wires. (170)
A Prophecy Fulflled (1) History of the telephone. (157, 170)
Putting a Telephone Together (1) Trick photography. (162, 170)
Short Cuts to Quantity (1) Few examples of achievements of mass production of telephones without sacrifice of quality. (162, 170)
Something about Switchboards (1) Unusual processes in fabricating and installing equipment for telephone exchange. (162)
The Telephone Repeater (1) Operation of vacuum tube as a telephone repeater which amplifies the voice current at intervals. (162)
That Little Big Fellow (1) Functions of electric current in the making of a telephone call; animation. (9151, 9110)
Voices Across the Sea (1) Telephone bridges miles between United States and England. (170)
The World's Telephone Workshop (1) Photographic side-lights of unusual manufacturing processes. (162, 170)
(See also Groups 65. 67-8, 74, 97, 114)
Find Distributors by reference-numbers (pages 129-ff.)