Zentmayer
Modified Mount for Abbe Condenser
The mounting of this
valuable apparatus is designed to be used
conveniently with most English arid American stands
provided with sub-stages. It is fitted into the
substage. A rotating platform, provided with a
pinion,carries a sliding plate with a rack engaging
the pinion whereby eccentric movements may be given
in addition to rotation. The Iris diaphragm is
pivoted to the sliding plate, and may be swung
aside to receive stops conveniently. The condensing
system of 1.20 N. A. is sufflcient for all
objectives of not greater numerical aperture.
Beyond that, the condenser of 1.40 N. A. is
necessary.