Bausch & Lomb Investigator
microscope circa 1893
Investigator model was patented by Bausch & Lomb in 1876, and
produced into the 1890s. This
model has a triple nosepiece with three original Bausch & Lomb
lenses, a ½, Ό, and 1/8 all with matching, signed Bausch
& Lomb brass canisters. There
are two original eyepieces. The
optical system produces very clear, sharp images of good contrast.
Coarse focus is rack and pinion, fine focus with micrometer knob.
The substage has a wheel of stops and a plano-concave mirror in
very good condition, noting age wear along the edges. The rotating circular stage has an accessory glass cover.
The original finish of the microscope lacquered brass with a
painted base. The coverage
is complete with typical age wear.
The instrument is 12 ½ tall when fully closed.
It is signed on the stage, Bausch & Lomb Optical Co.
The original finish is lacquered brass with a gold painted base.
Coverage is complete with typical age wear.
The original pine case with paneled door and brass carry handle,
is in very fine usable condition with lock but no key, replacement
latch, and interior accessory drawer.
The Investigator, Universal, and Professional models preceded the
Bausch & Lomb Continental design, and are much less common,
especially in fine condition. This
particular example has an impressive optical system and is in very fine