318 



NOTE ON A NEW HAND MICROTOME. 



the cylinder. This is open to two objections : firstly, the material, 

 if at all delicate, is liable to be crushed whilst wedgmg it into 

 the cylinder; secondly, the motion upwards of elastic material 

 such as pith or cork cannot possibly be regular. This latter 



Fig. 1. 



objection, although not the former, has to some extent been 

 removed by employing a double cylinder, the one in which the 

 material is held being moved bodily upwards by means ot the 

 micrometer screw. In yet another pattern a clamp has been 

 added so as to remove the first objection urged ; but the microtome 



