The microscope set up for
use with polarized light. The polarizer can be rotated
using a worm gear and the analyzer is also capable of rotation.
The microscope is constructed in brass with a bright lacquered surface
finish and is about 18 inches tall when
set up for use in the inclined position with the draw-tubes partially
extended as shown in some of the photos. The main focus is by rack and
pinion and the fine focus is by calibrated micrometer screw operating on
the nosepiece. The interocular separation is adjusted by moving the
draw-tubes by rack and pinion. The microscope is equipped with a
mechanical stage having orthogonal
motions and an adjustable slide holder. The instrument is
supported by double pillars. The substage consists of a cylindrical
holder, which accommodates the various accessories. The mirror is
double sided with plane and concave glasses.
The accessories consist
of two pairs of eyepieces labeled A and B, three single
eyepieces labeled C, D, and E, three Dancer objectives
(2/3, 2, and 3-inch), a 4-inch objective by Robinson
& Sons, Dublin, a Nicol polarizing prism in a
rotating mount, an analyzing prism in a rotating mount,
frog plate, hand forceps, stage forceps, achromatic
condenser with various stops, substage diaphragm wheel,
glass trough, brass mounted selenite stage with
rotation, live box, free standing bulls-eye condenser,
dissection tools, and other odds and ends. The other
draws contain prepared microscope slides.
The inside door of the case bears Dancer's trade label. Apparently, in later years, the microscope was resold by Broadhurst & Clarkson.
J. B. Dancer 1870 advertisement