Hand
spectroscope
R&J.
Beck, Ltd
Lacquered brass Thorp's diffraction grating replica hand
spectroscope (length 11.4 cm) and his cylindrical cardboard
case.
Signed R&J. Beck LTD, ca 1930.
Collection: Museum
for the History of Sciences, Universiteit Gent, Belgium
(inventory number: MW 98/2598)
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