pene Wi lhOCROSCOPE 
NOVEMBER, 1897. 
NUMBER 59 NEW SERIES 
—_— a 
A New Microtome. 
By SIDNEY YANKAUER, M. D. 
NEW YORK CITY. 
The instrument eonsists of two parts,a stand anda 
movable right-angled piece. The stand consists of a tri-- 
angular piece of metal across the base of which an oblong 
piece of plate glassis fixed. Atthe apexof the triangle, 
a, is a small elevation, at the summit of which isa small 
hole 4 inch in diameter and 4 inch deep. The bottom of 
this hole is on a level with the glass plate, so that if the 
surface of the latter were prolonged into a plane, this 
plane would just touch the bottom of the hole. 
Near the glass plate a vertical rod is inserted which 
can be fixed in any desired position by aset screw; to the 
top of this rod the specimen holder is fixed. 
The sliding piece consists of a piece of metal bent into 
aright angle, e, f, g. One arm is about 73 inches long, 
the other is 124 inches long. The angle and both ends 
of this sliding piece are perforated by screws which are 
pointed at the ends and capped by small spheres. These 
screws are interchangeable. 
The sphere on the screw point, at e, fits exactly into the 
hole at the apex of the stand, the top of this screw car- 
ries « circular plate divided into one hundred parts by a 
scale. This isthe micrometer screw. All the screws are 
large, having only ten turns tothe inch. The blade, fig. 
1, h, is fastened to the long arm by the thumb-screw, t, at 
