1886. ] Microscopy. 407 
By shifting the position of the diopter (sight vane) on a mirror 
glass plate, the eye can follow the outlines of the object placed 
below the glass as they appear at the intersection of the cross- 
wires contained in the diopter. The table is supported by four 
Square wood frames which together bound a cubical area, as 
shown in the figure. A pane of glass, fitted with a frame, repre- 
sents the upper surface of the cube, while the five other sides are 
open so as to admit of the frame with the plate being placed upon 
any side of the cube. On the lower frame Schroeder’s stee 
pincers are fitted, by means of which the object may be placed in 
such a position as to be completely detached and visible from all 
sides. These pincers firmly grasp the object; this is effected by 
fastening a screw and by three sharp points. The axis of the 
pincers has a bilateral clamping movement, which may be regu- 
# 
lated by means of a screw; then there is around bar fixed on = 
two opposite sides of the lower frame, on which a vertical rota- 
tion of the axis of the pean and a horizontal sliding movement = 
of the object can take pla 
able by means of a special screw and admitting of a horizontal 
rotation of the object. The drawing-board, which is connected 
with the table by means of hinges, can be folded down upon the 
glass plate of the table. ee 
: a ne figure the pantograph, consisting of the diopter and pen- 
cii Connected by a frame-work for mechanical adjustment, is 
resented in position for drawing. The drawings may be made of 
the nr re Or they may be enlarged or reduced, according to- 
€ Proportions required ; ‘ : i 
= „ For the use of tourists a folding instrument is made. 
: Ment objects are placed on three pins, which can be 
. 
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