A petrological micrsocope by Nachet,

Details

A petrological micrsocope by Nachet,
signed on the horseshoe base Nachet et Fils 17 rue St. Severin Paris, in lacquered and oxidised brass, with separate nosepiece focussed by rack-and-pinion and screw on stage-mounted pillar, the main body-tube with rack-and-pinion and limb from rear pillar, swing-out prism, slide-out lens and four eyepieces, circular mechanical stage with silvered vernier scales, swing-out substage with swivelling condenser and plano-concave mirror -- 15in. (38cm.) high, late 19th century, in mahogany case

Lot Essay

Another example of this pattern, but on a double-pillar base, is included in the Billings Collection (The Billings Microscope Collection, 2nd edition, Armed Forces Institute of Pathology, Washington D.C., 1974, p. 93).

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