ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
351 
The drawback to the serviceability of the apparatus is the fact that 
it is fixed to the stage, and cannot therefore be easily cleaned. 
New Portable Microscope. — At the meeting on May 20th Mr. 
E. M. Nelson read the following: — This portable Microscope (fig. 60) 
was made by Baker at the instance of Surgeon-Major Ross, of the Indian 
Army Medical Department, principally for the diagnosis of malarial 
fever. It only weighs 2 lbs. with lenses complete, and when folded 
measures 7 X 3 x 2£ in. It is fitted with a rack work coarse-adjust- 
ment and direct-acting screw fine-adjustment, a draw-tube, achromatic 
condenser (doublet) in sliding focusing tube, iris diaphragm, and plane 
and concave mirrors. It has a tripod stand with a spread of no less than 
6J X 6 in. 
When the tube is extended the body measures 7 in. ; additional length 
for adjustment may be obtained by drawing out the eye-piece. 
In India, where long distances have to be traversed on horseback, 
portability and lightness are important qualities. These have been 
secured in this instrument without sacrificing the essential points of a 
good rough and ready working Microscope. 
C2) Eye-pieces and Objectives. 
Leitz new Drawing Eye-pieces.* — Dr. P. Schiemenz describes two 
new drawing eye-pieces recently brought out by the firm of Leitz. 
These are represented in figs. 61 and 62. The eye-piece shown in' fig. 61 
serves for drawing with the Microscope inclined, that shown in fig. 62 for 
Fig. 61. Fig. 62. 
drawing with the Microscope in the vertical position. The drawing 
apparatus, the prism (fig. 63 pr) in its metal frame, is attached to a cap 
(fig. 63 c), which is screwed over the eve-piece. In the metal frame 
beneath the prism is a groove in which smoked glass plates can be 
inserted in order to diminish the intensity of the light from the drawing 
* Zeitschr. f. wies. Mikr., xii. (1896) pp. 289-92. 
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