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Hand-held spectroscope with case
Adams & Adams ; Henry Heil Chemical Company ; Adams & Adams ; Henry Heil Chemical Company
Hand-held spectroscope in a case. The case is made of black cardboard with a blue paper lining, and measures 15 x 6.5 x 4 cm. The spectroscope is made from black plastic [...]
circa 1920 | Still image | Historical Collections and Archives |
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