Bausch & Lomb Continental brass microscope – circa 1909

A  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 continental era.

Item 1306