382 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



with linoleum. Fig. 00 shows the bath in section. Fig. 70 gives the 

 outside view of the apparatus. The air pump and other accessories, 

 thereto are omitted. 



Fig. 70. 



Reichert's Medium Microtome.* — The section-cutting in this 

 apparatus (fig. 71) is regulated by the draw-back of the knife, so that, 

 at pleasure, a thickness of from 0*002-0 "02 mm. may be automatically 

 obtained, and a series of uniformly thick sections produced. As the 

 object is only moved vertically, a much shorter bed-length will suffice- 

 than in oblique microtomes. The object can be directly inserted, or 

 imbedded in paraffin, or celloidin, in the usual way. The bed and frame 

 are made of cast-iron. The micrometer screw is worked with especial 

 care, and has a diameter of 10 mm. and a pitch of - 4 mm. A zinc- 



* C. Keichert (Vienna), Catalogue No. 25 (Mikroskopie, 1904) p. 58, fig. 29. 



