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Published

Leeds & Northrup Company, Philadelphia (29)
C. F. Casella & Co. Ltd., London (27)
Carl Zeiss, Jena, Germany (20)
Carl Leiss, Berlin (18)
Fairchild Aerial Camera Corporation, New York (17)
Spencer Lens Company, Buffalo, NY (17)
Bausch & Lomb Optical Co., Rochester, NY (13)
R. Fuess, Berlin (11)
Cooper Hewitt Electric Co., Hoboken, NJ (10)
Weston Electrical Instrument Corporation, Newark, NJ (8)
R. & J. Beck, Ltd., London (7)
Cooke, Troughton & Simms, Ltd., London (6)
E. Ducretet et Cie, Paris (5)
E. R. Watts & Son, Ltd., London (5)
Honeywell, Inc., Denver, CO (5)
Max Kohl A.-G., Chemnitz, Germany (4)
Optisches Museum, Jena, Germany (4)
Spencer Lens Company, Boston, MA (4)
Zeiss Ikon, Dresden, Germany (4)
Arthur H. Thomas Company, Philadelphia (3)
Aug. Bel & Co., London (3)
Burghley House, Stamford, UK (3)
Carl Zeiss, Inc., New York (3)
Chicago Apparatus Co., Chicago (3)
Consolidated Machine Specialty Co., Boston (3)
E. Leitz, Inc., NY (3)
General Radio Company, Cambridge, MA (3)
General Radio Company, West Concord, MA (3)
Harvard University, Cambridge, MA (3)
Henry Hughes & Son, Ltd., London (3)
Hess-Ives Corporation, Philadelphia, PA (3)
James A. Sinclair & Co. Ltd., London (3)
James J. Hicks, London (3)
Jarrell-Ash Company/Boston, MA (3)
Spencer Lens Co., Boston (3)
Spencer Lens Co., Buffalo, NY (3)
Spencer Lens Company, Boston (3)
Universal Scientific Company, Inc., Vincennes, IN (3)
Western Electric Company, New York (3)
Wild Heerbrugg Limited, Heerbrugg, Switzerland (3)
A. T. Thompson & Company, Manufacturers, Boston (2)
Abrams Instrument Company, Lansing MI (2)
Adam Hilger, Ltd., London (2)
Allen B. DuMont Laboratories, Inc., Passaic, NJ (2)
Apps, London (2)
Beijing Ancient Obervatory, Beijing (2)
Brooklyn Thermometer Company, New York (2)
C. Baker, London (2)
Carl Zeiss, Jena (2)
Central Scientific Company, Chicago, IL (2)

Year *

0 (1,001)

Thesaurus

Lib-3f (75)
Microscopes (67)
Computer -- History (65)
Electricity (58)
C3-D4 (54)
C5-H1 (46)
C6-A1 (44)
C3-D1 (43)
C5-A3 (41)
C6-A2 (41)
Optical Instruments (40)
C5-D3 (35)
Scientific Instruments (30)
C4-H1 (28)
C5-E1 (28)
Electronics (26)
Leeds & Northrup Company (26)
Photography (25)
C. F. Casella & Co. Ltd. (25)
C3-F1 (25)
C5-C1 (24)
Subjects (23)
C3-D3 (23)
C6-B1 (22)
Spencer Lens Company (21)
Radio (21)
Optics (20)
C3-F2 (20)
C5-G3 (20)
Astronomy (19)
C5-B1 (19)
C5-H2 (19)
Carl Leiss (18)
C4-B4 (18)
C5-F1 (18)
Galvanometers (17)
Graduating Engines -- Wurdemann (17)
photography -- aerial (17)
C4-A2 (17)
C4-G1 (17)
Vacuum Tubes (16)
C4-G4 (16)
Physics (15)
Bausch and Lomb (15)
Graduating Engines -- Heyde (15)
C5-H3 (15)
Surveying (14)
Carl Zeiss, Jena (14)
C4-F1 (14)
C5-B2 (14)
Image Not Available

Unpublished examinations in physics -- electromagnetism

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Preliminary Experiments in Magnetism

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(a transit book --blank notebook with surveying data and diagrams written within with pencil)

Image Not Available

Practical Chapters on Static Electricity

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Illustrated Catalogue: High Grade Optical Projection Apparatus

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Optical Projection Apparatus and Accessories for Colleges, Schools, Y.M.C.A. Buildings, Public Libraries, Churches Etc.

Image Not Available

On the effect of moisture in modifying the refraction of plane polarised light by glass

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On the theory of some experiments of Fröhlich on the position of the plane of polarization of light diffracted at reflexion from a grating

Image Not Available

Note on the rotation of the plane of polarization of light by a moving medium

Image Not Available

The Early History of Electricity in America

Image Not Available

Photograph of statue of Joseph Leidy and photograph of portrait by Gilbert Stuart of Joseph Priestly

Image Not Available

Advance in Astronomical Science

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