ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 167 
Microscope will not greatly tax ingenuity, but its position will neces- 
sarily vary with the type of Microscope employed. 
When it is desired to use the apparatus, it is placed in front of an 
open* window, and the Microscope is placed on the base-hoard at such a 
distance from the vertical pillar that the axis of the camera, when placed 
in position, may coincide with that of the Microscope. Having found 
this position, make a pencil outline of the foot of the Microscope on the 
Fig. 10. 
Camera swung aside to admit of adjustment of light, focusing, &c. 
base-board, so that it can be, in future, removed and replaced without 
further trouble. 
The camera is now screwed on to the plate of the upright, and 
adjusted so that its focusing-screen is accurately parallel with the 
base-board and the stage of the Microscope ; but it is not, at this stage 
of the proceedings, placed over the Microscope, but turned aside out of 
the way, by twisting the inner tube of the standard within the outer one, 
