& Lomb Continental brass microscope – circa 1909
late model continental microscope signed, "Bausch & Lomb
Optical Co., Rochester, N.Y., 75683", on the base -- the serial
number dating it to circa 1909. The
microscope also shows the triple alliance triangular logo on the stand
and on the nose piece. The
instrument stands 11 1/4" tall when closed. Coarse focus is rack and pinion, and fine focus with an
indicator micrometer knob on top of the limb. The controls are in
excellent operating condition. The sub stage Abbe condenser has two
variable iris diaphragms, one above the Abbe lens and one below, in
addition to a swing out filter holder.
The stage is equipped with an original Bausch & Lomb
mechanical stage with the triple alliance logo on the rear.
The plano-concave mirror is on both sides. The parfocal optical
system is comprised of three original Bausch & Lomb lenses and two
eyepieces. The lenses include a 16mm, a 4mm, and a 1.8mm oil. The
eyepieces are numbered, 5, and 10, and have the Bausch & Lomb
triangular logo. The optical system produces clear and sharp images. The
finish on the microscope is lacquered brass with a painted black base.
The lacquer and paint coverage is complete, and in excellent condition
on the microscope, but shows wear on the mechanical stage. The
instrument is housed in its original case, which is in fine condition
with metal carry handle, lock but no key.
With its circular nose plate, double substage iris, and partial
black coloring, this microscope is a refined example of the late