A LACQUERED-BRASS SOLAR MICROSCOPE

SECRETAN, CIRCA 1860

Details

A LACQUERED-BRASS SOLAR MICROSCOPE
Secretan, circa 1860
signed on the plate Secretan, à Paris, the mirror with two geared adjustments for rotation and angle to plate, threaded extension for body cone, sprung slide holder and rack and pinion focusing; in fitted case with accessories in two-tier box with fish plate and eleven slides.
15in. (38cm.) wide in case

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