PHILADELPHIA 
The micrometer screw works in a block which is provided with an arrange- 
ment for taking up any possible wear. 
The knife is the same quality as supplied with the large laboratory microtome, 
and is manufactured by the same process in our own factory. It is not equalled 
by any of European manufacture. 
The dimensions of the Microtome are as follows : 
Length of Bed 208 mm. (8 inches). 
Total Height 130 mm. (5 inches). 
Limit of Adjustment of Micrometer Screw . 18 mm. inch). 
Limit of Vertical Adjustment of Clamp . . 26 mm. (i inch). 
Diameter of Graduated Disc 45 mm. (2 inches). 
Pitch of Screw o. 5 mm. 
Graduations on Head of Micrometer Screw, 100. 
2130. Small Laboratory Microtome^ with clamp, as shown on page 
41 (without case), with knife of best hand-forged steel, 12 cm. 
cutting edge of blade, in plush-lined case $20 00 
2132. Lever Feed^ for Small Laboratory Microtome, in place of regu- 
lar feed, extra 13 50 
This feed is similar in construction to the Lever Feed 
arrangement, described under Large Laboratory Microtomes, 
except that the graduated disc is necessarily smaller to corre- 
spond with the smaller stirrup of the Small Laboratory Micro- 
tome. The reduced size of the disc makes it necessary to reduce 
the number ot notches on the margin to 100, each of which has 
a value of 5 micra., which is the minimum motion of the feed. 
No. 2134. Simple Microtome 
No. 2136. Hand Microtome 
45 
