The lever located at the nosepiece moves the Wenham prism in and out of the optical path.
The accessories consist
of six Grunow objectives (2, 1-1/2, 1, 2/3,
1/10, and 1/15 inch) each with brass canister,
two pairs of oculars, analyzer prism (screws
above the objective), substage polarizer, camera
lucida, paraboloid condenser, and some adapters
and aperature stops. Note that the objectives are in short mounts allowing them more effective when using the Wenham prism. The painted wood storage case
with glass front and internal drawer was custom made for this microscope,
but it is not the original case.
microscope dates from around 1874. The Grunow
brothers, Julius and William, emigrated from Germany
to New York around 1849. They started in the
scientific instrument business by first working for
the optician Benjamin Pike of that city. By 1854,
they began their own operation in New Haven CT where
they concentrated on the production of microscopes.
By 1864, they were back in New York. Some years
later, the partnership ended. J. Grunow continued on
to produce microscopes up to around 1892. The total
output of the Grunows was limited in comparison to
some other contemporary firms; on the basis of the
observed serial numbers, they manufactured just over
one thousand microscopes in total.