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/ 12
9 lantern slides of diffraction patterns, atomic structure, spectra.

9 lantern slides of diffraction patterns, atomic structure, spectra.

Jefferson Physical Laboratory, Harvard University
1925-1940
100g of yttrium dust in sealed glass tube

100g of yttrium dust in sealed glass tube

Percy Williams Bridgman
circa 1925
Acme mounted rectifier, oscillator, and vacuum tube for teaching

Acme mounted rectifier, oscillator, and vacuum tube for teaching

ACME Apparatus Company
circa 1920
Ader "bull ring" receiver

Ader "bull ring" receiver

Louis-Clément Breguet
circa 1881
Ader "bull ring" receiver

Ader "bull ring" receiver

Louis-Clément Breguet
circa 1881
aluminum alloy samples in sealed glass jar

aluminum alloy samples in sealed glass jar

Aluminum Company of America
circa 1925
argentite sample in sealed glass tube

argentite sample in sealed glass tube

Percy Williams Bridgman
dated 1924
artifical azobenzene crystals in sealed glass jar

artifical azobenzene crystals in sealed glass jar

Percy Williams Bridgman
circa 1925
artifical benzophenone crystals in sealed glass jar

artifical benzophenone crystals in sealed glass jar

Percy Williams Bridgman
dated 1931
artifical salol crystals in sealed glass jar

artifical salol crystals in sealed glass jar

Percy Williams Bridgman
circa 1925
astronomical regulator with a 24-hour dial

astronomical regulator with a 24-hour dial

German
late 19th Century
barium-selenium alloy samples in sealed glass tube

barium-selenium alloy samples in sealed glass tube

Percy Williams Bridgman
circa 1940
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