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 /// to 25^1 and any intermedi- 

 ate thickness. 



