Bauhaus-Universität Weimar

The Sciopticon Manual, Explaining Lantern Projections in General and the Sciopticon Apparatus in Particular Including Magic Lantern Attachments, Experiments, Novelties, Colored and Photo-Transparencies, Mechanical Movements, etc.
Marcy, L. J.
It consists of an ordinary microscopic glass slip, of greater 
thickness and size than usual, with a spherical cavity about 
three quarters of an inch across, and one-sixteenth of an 
inch deep, ground and polished in the middle of one face. 
This, when in use, is closed by a thin glass cover, which is 
kept in place by adhesion and atmospheric pressure, the 
cavity beneath it being filled with water containing the insect 
or other object. 
If it is desired to use high powers, we must be contented 
with a limited selection of objects, choosing such as are 
strongly defined and well colored. Diatoms, blood-disks, 
or other objects which are delicately tinted or colorless are 
quite unfit for such use. A strongly colored eye of a fly, 
sting of a wasp, or other part of an insect, such as a claw 
of a spider, answer well. 
In this case I have obtained the best results with Zent- 
mayer’s ts objective, using an extra condenser, consisting 
of a plano-convex lens of about three inches focus, and an 
inch and a half in diameter, placed about an inch back of 
the object. 
This greatly increases the illumination of the field. 
In using the gas microscope, much depends upon the 
efficiency and convenience of the support for lenses and the 
stage, or what is known commonly as the “ gas microscope 
The microscope attachment for the Sciopticon is repre¬ 
sented by the following wood cut. 
The microscope body, to which the 
objective is attached by a sliding tube, 
is fitted to the grooved arm, and moved 
by rack and pinion for accurate focus¬ 
ing, similar to our best table micros¬ 
copes. This curved arm is fastened to 
the stage plate, which is attached to 
Ji'ig. 54.


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