Laurent Type Polarimeter

Probably a French import c. 1900

Laurent Type Polarimeter c. 1900

Laurent Type Polarimeter c. 1900

Laurent Type Polarimeter c. 1900

From the 1906 Bausch & Lomb catalog:

laurent polarimeter by bausch and Lomb

polariscope lamps

Laurent Half Shade Polarimeter or polariscope

Half shadow polarimeter

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