Science History Institute
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The Science History Institute is an institution that preserves and promotes understanding of the history of science. Located in Philadelphia, Pennsylvania, it includes a library, museum, archive, rese
The Science History Institute in Philadelphia in October 2019
Chemical Heritage Foundation building
"Old Faithful" bakelite cooker model, in museum
Exhibition gallery of the Science History Institute
DU spectrophotometer
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The DU spectrophotometer or Beckman DU, introduced in 1941, was the first commercially viable scientific instrument for measuring the amount of ultraviolet light absorbed by a substance. This model of
Science History Institute
…of instrumentation. As early as 1989, the Beckman Center had requested the loan or gift of Beckman Instruments such as the Beckman pH meter and the DU spectrophotometer for display at the center. Some of those instruments were included in an instrumentation exhibition organized by W. Richard Howe of the University of…
DU Spectrophotometer, National Technical Laboratories, 1947
Optical quality quartz crystals
Quartz photoelectric spectrophotometer, Cary & Beckman, 1941
Disassembled absorption cell and photo-tube compartment, Cary & Beckman, 1941