DOUBLE REFRACTION APPARATUS
Lot 217

DOUBLE REFRACTION APPARATUS

FRENCH, 19TH CENTURY

Fermé21 April 2016

Estimation

GBP 2,000–3,000

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DOUBLE REFRACTION APPARATUS
FRENCH, 19TH CENTURY
signed M.on. Jules Duboscq Ph Pellin Paris, screw mechanism for rotating disc 0-180-0 with vernier, hinged on compass joint on lacquered brass column on cast iron tripod case, marked with O.3.
20in. (49cm.) high