Bausch & Lomb “Model” brass microscope – circa 1890
A very fine
Bausch & Lomb “Model” microscope that was made from 1883-1896. It
is signed, “Bausch & Lomb, Optical Co.”, on the stage, and comes
with one original eyepiece and two
lenses. The closed height is 12".
design was attributed to Gundlach when he was with the Bausch & Lomb
firm. This design was both practical and popular, and lasted into
the 20th century. The lenses are a ¾” and 1/5”,
both signed with an original signed brass
canister for the 1/5" lens. The optical
system is superb for its era. It is an
authentic, early system marked as the "student" series for an 8 1/2"
tube length. The lenses produce excellent images of
high contrast, sharpness, and bright color.
Coarse focus is rack and pinion, and fine focus is
achieved with a micrometer knob on top of the limb. The mirror is
plano-concave, excellent on the plane side, and showing age spotting
on the concave side. The mirror can rotate on a compass joint so
that it can be used above stage for oblique illumination of opaque
subjects. The substage condenser is a wheel of stops. The
microscope is finished in lacquered brass with a black painted
base. The finish is complete with some spotting to the optical tube
and stage. A mahogany case with brass carry handle and interior
accessory drawer holds the microscope and its accessories. The case
is in very fine, usable condition with lock but no key, and
an interior accessory drawer. This is a very fine example of
an early American instrument. Its rare,
fine condition makes a handsome display, while its excellent optical
system makes it a joy to use.