CH. X ] 



APPARATUS FOR SECTIONING 



277 



Fig. 22 r. i>\ 



Fig. 221. 



A B 



Fig. 222. 



Fig. 220-222. A paraffin holder clamp and a razor siipportfor the Minot Mi- 

 crotome. ( Trans. Amer. Micr. Soc, igoi). 



Fig. 220. Clamp for the paraffin block holder. In A it is shown in section, in 

 a side view. With this clamp one can use stove bolts as well as the expensive par- 

 affin holders furnished with the instrument. A laboratory can have as many par- 

 affin block holders as necessary without undue expense. 



Fig. 221. Razor Support and Razor. 



(A) Support with heavy base and vertical piece. The base should be capable 

 of moving endwise one or two centimeters to bring Vie opening in the vertical part 

 opposite the paraffin block. 



(B) Front piece to the razor {see Fig. 222 A ). 



( C) Razor with straight back and edge. By moving this back and forth on 

 the support nearly the entire cutting edge can be utilized. 



Fig. 222. The knife support of the microtome with the razor support and 

 razor in position. 



{A) Front view ; (B) Back view. In the inclination of the knife toward the 

 paraffin block is shown. 



