688 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
MICROSCOPY. 
a. Instruments, Accessories, &c.* 
(1) Stands. 
A Cornea-Microscope.f — Dr. S. Czapski and Dr. F. Schanz have 
devised an instrument with which it is possible to adjust a Microscope 
upon the cornea, and at the same time keep the spot under observation 
intensely illuminated from the side. 
Fig. 95. 
The instrument consists of a Microscope M and an illuminating tube B 
in rigid connection with it (fig. 95). The Microscope M is adjustable by 
rack and pinion T. To the body-tube M is attached an arc a, on which 
the illuminating tube B can be firmly fixed by a clamping screw in dif- 
ferent positions so as to vary the angle of incidence of the light, while 
the point of convergence C remains always the same. 
The illuminating tube contains at one end a glow-lamp G, which is 
fixed in the focus of a condensing lens in the interior of the tube. A 
second lens near the other end of the tube is fastened in a small tube 
and can be displaced by the knob h in the direction of the axis so that 
the point of convergence of the light can be regulated. 
The instrument is mounted on a pillar which stands on a heavy 
* This subdivision contains (1) Stands ; (2) Eye-pieces and Objectives ; (3) Illu- 
minating and other Apparatus; (4) Photomicrography; (5) Microscopical Optics 
and Manipulation; (6) Miscellaneous. 
f Zeitschr. f. Instrumentenk., xiii. (1893) pp. 250-2; Klein. Monatsblatter f. 
Augenheilkunde, 1893. 
