44 
a slow and more delicate motion. When the screw has been 
turned until the condenser has reached the lowest point, a further 
turn of the screw causes it to turn out automatically to the 
left, in which position the condenser system can be changed or 
centered. 
A specially large mirror fixed to a sliding holder allows of 
a wide range of up and down movement, and, when the condenser 
is swung outward, can be placed in any oblique position. 
The condenser has an aperture of 1.40. 
In accordance with the wishes of Prof. Babuchin we make 
two models of this stand. 
a) Large BABUCHIN Stand, with rotating and centering 
stage (similar to stand IP' ). The whole body of the stand is 
attached by a hinge joint to a prism-shaped pillar sliding in an 
outer tube, so that it can be withdrawn and fixed by a clamping 
screw. This arrangement admits of a compact form being given 
to the instrument and of an increase to the height of the stage 
and stand generally, should this be required for the application 
of a photographic camera, the insertion of some larger substage 
apparatus etc. 
The height of the stand may be thus varied from a minimum 
of about 200 mm, with a body-length of 160 mm, to a maximum 
of 230 mm ; that of the stage from 105 to 135 mm. — This stand 
is fitted with the new micrometer fine adjustment (Fig. 10) . . 
b) "Student's Microscope" after Babuchin — which has 
the same upper body as its predecessor; it is, however, not in- 
clinable, does not admit of the variation of the height of the 
stage and is provided with a somewhat simplified illuminating 
apparatus, which does not allow of the iris diaphragm supplied 
with the stand being rotated or placed in an obli(iue position ; it 
is, however, provided with a condenser of 1.40 aperture . . . 
Marks 
330.— 
200.- 
