細節
A student's microscope by J.B. Dancer,
with rack-and-pinion and nosepiece fine focussing, one eyepiece, two objectives, polariser and aperture wheel, plano-concave mirror and double-pillar stand on tripod platform foot signed J.B.Dancer Optician Manchester -- 13in. (33cm.) high, mid-19th century, in mahogany case with Dancer trade label in door
with rack-and-pinion and nosepiece fine focussing, one eyepiece, two objectives, polariser and aperture wheel, plano-concave mirror and double-pillar stand on tripod platform foot signed J.B.Dancer Optician Manchester -- 13in. (33cm.) high, mid-19th century, in mahogany case with Dancer trade label in door