PRACTICAL HISTOLOGY. 



can be out varying from ^, ^ T J<y> T5> TH* to TO mm - Instead 

 of the knife supplied with the apparatus, a razor may be used. 



The sections can be received on 

 a silk ribbon, as shown in fig. 39. 

 This is clamped to the apparatus. 

 The sections are received on the 

 ribbon, which is rotated by means 

 of a milled head. 



Jung's or Thoma's Microtome. 

 In this instrument the tissue to 

 be cut is fixed in a clamp, the 

 knife is fixed in another heavy 

 clamp which moves on planed sur- 

 faces. After each section the 

 tissue is pushed up an inclined 

 plane by means of the milled head 

 on the extreme right of the figure 

 (fig. 40). 



Malassez's Modification of 

 Roy's Microtome (fig. 41). Some- 

 times it is desired to cut sections 

 of a tissue while it is under fluid, 

 e.g.) alcohol. This can be done as 

 shown in fig. 41. 

 move on its base, and can be placed 



FIG. 39. Silk Band for Catching the Chain 

 of Serial Sections made by Minot's 

 Microtome. 



The microtome is made to 



FIG. 40. Thoma's Sledge Microtome, as made by Jung. 



vertically in such a way that the razor and the piece of tissue to be 

 cut come to lie in a vessel filled with alcohol. 



