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mineral sample in sealed glass tube

mineral sample in sealed glass tube

Percy Williams Bridgman
circa 1925
grating monochromator

grating monochromator

Bausch & Lomb Optical Company
circa 1970
microfilm of <i>Akustische Zeitschrift</i>, vol. 7, nos. 1 and 3

microfilm of Akustische Zeitschrift, vol. 7, nos. 1 and 3

Department of Psychology, Harvard University
dated 1942
three small spools of metal wire in a stoppered glass test tube

three small spools of metal wire in a stoppered glass test tube

Percy Williams Bridgman
dated 1916
Image Not Available

figure (#3) from the cover of a book

Vantage Art, Inc.
circa 1967
plans (part 1) for building the Elgbrant etching machine

plans (part 1) for building the Elgbrant etching machine

Daniel Branton
1977-1984
spectral adaptometer

spectral adaptometer

George Wald
circa 1960
central processing unit card for Power Mac 7500

central processing unit card for Power Mac 7500

Apple Computer Inc.
circa 1995
obsidian sample in a sealed glass tube

obsidian sample in a sealed glass tube

Percy Williams Bridgman
dated 1924
bismuth pressure gauge in an open-ended glass test tube

bismuth pressure gauge in an open-ended glass test tube

Percy Williams Bridgman
dated 1923
six magesium sulfate crystals in a stoppered glass test tube

six magesium sulfate crystals in a stoppered glass test tube

Percy Williams Bridgman
dated 1927
microfilm: "The Antecedents and Influences of Smoking Behavior in High School"

microfilm: "The Antecedents and Influences of Smoking Behavior in High School"

Harvard University Library Microreproduction Department
dated 1977
/ 226

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