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LicenseLummer plate, made of quartz
Science Museum Group
© The Board of Trustees of the Science Museum
Lummer plate, made of quartz, for splitting light into a spectrum with very high resolution, in felt-lined wooden case for storage, with felt-lined metal stand for use. Stand has two fixed feet and one levelling foot and is engraved 'QUARTZ. / THICKNESS = 4.60M/M / ADAM HILGER LTD. / LONDON, ENGLAND.'
