CH. X] 



APPARATUS FOR SECTIONING 



275 



nor with the same precision. For much of the work one may section free-hand, 

 without a microtome. Indeed the great basis of histological and embryological 

 knowledge was gained by studying free-hand sections and dissections. At the 

 present time there is a strong reaction against the exclusive study of sections, 

 and a tendency to combine with the serial sections dissections such as the older 

 anatomists and embryologists made and gained so much from. 



Fig. 217. A Microtome for 

 all kinds of sectioning ; the 

 knife is guided by the top of the 

 microtome, but moved by the 

 hands of the operator (Bausch & 

 Lomb Optical Co.) 



Fig. 218. The Minot microtome for ribbon sections as made by Bausch and 

 Lomb Optical Co. It is arranged for sections from iju to 2511 and any intermedi- 

 ate thickness. 



