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  • Year: 1925  
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Bell Telephone Laboratories, NY (3)
James G. Biddle, Philadelphia (3)
Bausch & Lomb Optical Co., Rochester, NY (2)
Carl Zeiss, Jena, Germany (2)
E. Leitz, Inc., New York (2)
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E. Leitz Optical Works, Wetzlar, Germany (1)
Ernst Leitz Optical Works, Wetzlar, Germany (1)
Experimenters Information Service, Inc., New York (1)
Humphrey Milford, Oxford University Press, London (1)
Journal of Scientific Instruments (1)
Leeds & Northrup Company, Philadelphia (1)
Lewis Electrical Supply Co., Boston (1)
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Sangamo Electric Company, Springfield, IL (1)
Schaar & Company, Chicago (1)
The Porter Chemical Company, Hagerstown, MD (1)
W. Heffer & Sons, Ltd., Cambridge (1)

Year *

1925 (37)

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Microscopes (7)
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Harvard College --history (2)
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Platinum (1)
Thermal Emission (1)
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Null-Reading Astatic Magnetometer (1)
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Harvard University Quinquennial Catalogue of the Officers and Graduates 1636-1925

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Harvard University Quinquennial Catalogue of the Officers and Graduates, 1636-1925

Sub-Title: Dupe
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Historic Instruments for the Advancement of Science

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Leitz Micro Camera Attachment

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Bausch & Lomb Binocular Microscopes: Greenough Type

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Wide-Field Binocular Microscope

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Leitz Microscope and Accessories, Dissecting Microscopes, Etc.

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Leitz Endell Thermal Microscope

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Wellington Plates - Price List

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Beobachtung der Interferenzfiguren im konvergenten Licht durch das Mikroskop

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Transatlantic Radio Telephone Transmission: An Analysis of Observations Obtained from Two Years of Transatlantic Transmission

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Thermionic Work Function of Oxide-Coated Platinum: A Study of the Thermodynamic Relations Involved in the Thermal Emission of Electrons from Platinum Coated with Oxides of Barium and Strontium

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