The microscope is
signed on two places, on the tube "Ernst Gundlach"
and on the base "Gundlach". A
similar microscope sold by Yawman & Erbe of
Rochester N.Y. is also represented in this
collection. It has a brass base instead of
the cast iron base that is on the microscope shown on this
page. The microscope shown on this page came supplied with two Gundlach
objectives and two eyepieces. The main focus of the microscope
can be accomplished by slip-tube or by rack and pinion, while the fine focus utilizes a micrometer screw mechanism. The
mirror can be positioned at any angle relative to the
stage including above the stage for illumination of
opaque objects. The draw-tube is nickel plated.
Philip Yawman and Gustav
Erbe were both employees of Bausch & Lomb. In 1880,
they left that firm to start their own business in
Rochester New York. For the greater part of the life of
the firm, Yawman & Erbe primarily were involved in
the manufacture of office furniture and equipment.
However, for a very brief period in the early 1880's
they manufactured microscopes. It appears that the
production of microscopes was in collaboration with
Ernst Gundlach, another former B&L employee. It is
clear that it was Gundlach who produced the optics, but
it is less clear which firm actually manufactured the
stands. Both firms often sold the same model
microscopes and, in fact, there are microscopes that
bear dual signatures by both firms. For example, see
"Nonpareil" model microscopes in
this collection. Additionally, the walnut storage cases for all
these microscopes are distinctive and identical. The microscope
shown in the engraving taken from The Journal of the Royal
Microscopical Society, 1882 was made by Ernst Gundlach
and was named "The College Microscope". It is similar to
the microscope shown on this page in many respects.
As stated above, after the termination of his employment by Bausch & Lomb in 1878, Ernst Gundlach, for a brief period, worked with Philip Yawman and Gustav Erbe (also former employees of Bausch & Lomb) in the production of microscopes. It is clear that it was Gundlach who produced the optics, but it is less clear which firm actually manufactured the stands.
Additional information about the Gundlach businesses in America is online.