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  • Year: 1940  
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Published

Federal Telegraph Company, Newark, NJ (7)
Bausch & Lomb Optical Co., Rochester, NY (4)
Henry Hughes and Son Limited, London (3)
Cambridge, MA (2)
RCA Manufacturing Co. Inc., Harrison, NJ (2)
United States Department of Agriculture, Washington, DC (2)
Agfa Ansco, Binghamton, NY (1)
Allen B. Du Mont Laboratories, Inc., Passaic, NJ (1)
C. L. Berger and Sons, Boston (1)
Chapman & Hall Ltd, London (1)
D. Appleton-Century Company, Incorporated, New York (1)
Gregory, Bottley & Co., London (1)
Harvard University, Cambridge MA (1)
Hjorth Lathe & Tool Co., Woburn, MA (1)
John F. Rider Publisher, Inc., New York (1)
Massachusetts Institute of Technology, Cambridge, MA (1)
Meissner Manufacturing Company, Mt. Carmel, IL (1)
New York University Press, New York (1)
Radio Corporation of America Manufacturing Co, Inc, Harrison, NJ (1)
Spencer Lens Company, Buffalo, NY (1)
The Cincinnati Milling Machine Co., Cinicnnati, OH (1)
U. S. Naval Institute, Annapolis, MD (1)
United States Patent and Trademark Office (1)

Year *

1940 (41)

Thesaurus

tubes (8)
C6-A3 (6)
Microscopes (4)
Optical Instruments (3)
Acoustics (3)
Bausch & Lomb Optical Company (3)
scientific instruments -- surveying (3)
RCA (3)
C3-D4 (3)
C5-E1 (3)
Frequency-Response Curve of Violins (2)
C4-A2 (2)
C4-C2 (2)
C5-C2 (2)
C5-H1 (2)
C6-A2 (2)
Tools (1)
Navigation (1)
Electricity (1)
Chemistry (1)
Physics (1)
Manufacturing (1)
Technology (1)
History of Science (1)
Harvard Science Aco (1)
Electrical Engineering (1)
Bausch and Lomb (1)
Patents (1)
Time (1)
Spencer Lens Company (1)
C. L. Berger (1)
Engineering Instruments (1)
Surveying Instruments (1)
Vacuum Tubes (1)
Radio (1)
Meters (1)
Reflecting Quadrant (1)
Thomas Godfrey (1)
photography -- equipment (1)
photography -- aerial (1)
codes (1)
weather -- reports, transmission of (1)
maps -- photography (1)
physics -- time (1)
geology -- minerals (1)
milling (1)
recieving tubes (1)
recieving tube (1)
Phonograph Pick-up Design (1)
H.U. Tercentenary (1)

My Object Lists

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AGFA Formulas for photographic use

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The American Inventor of the Reflecting Quadrant

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Bausch & Lomb Microscope Accessories

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Catalog D-111: Scientific Instruments

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Catalog D-111: Scientific Instruments

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Catalog D-185: Laboratory Microscopes Types A-B-C

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Catalog No. 12: Hjorth Bench Lathe and Attachments

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The Characteristics of the Magnetron Oscillator

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Contributions from the Physical Laboratories of Harvard University for the Year 1939

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Five drawings by A. Morse of stylus tip

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The Geological News

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How to Build Radio Receivers

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