This is an example of
the Ross improved Gillett achromatic condenser.
Itis marked: Ross 2053,
London. It has two diaphragm disks that can
be used in combination where each is controlled by a
milled knob. The upper disk has conventional
graduated apertures while the bottom disk has
apertures for dark field and oblique illumination.
Compare this with the
earlier form of the Gillett condenser.
No.1 Improved Binocular Microscope Stand.
Ross' Model (1), with two eye-pieces, coarse and fine adjustments for focusing, graduated concentric rotating stage, having 1 inch of rectangular motion, rack and screw movements, clamping lever, graduated sub-stage for holding and adjusting illuminating and polarizing apparatus, diaphragm plate, plane and concave mirrors, and Wenham's Binocular arrangement
No.1A Improved Binocular Microscope Stand.
Designed by Wenham,
on Jackson's Model (2), with two eye-pieces,
coarse and fine adjustments for focusing,
graduated concentric rotating stage, having 1
inch of rectangular motion, rack and screw
movements; clamping lever, graduated sub-stage
for holding and adjusting illuminating and
polarizing apparatus, diaphragm plate, plane and
concave mirrors, and Wenham's Binocular
arrangement.
Remarks on the Binocular Microscope by F. H. Wenham
See: Ross of London chronology by T. Wayland
