156 SUMMARY OF CURRENT RESEARCHES RELATING TO 



character over the older form, particularly in avoiding the diflScult 

 working of tlio screw d in the latter. 



A more perfect clamp is that shown in fig, 37, permanently 

 attached to the sliding carrier. It is also made to fit the ordinary 

 carrier. Rotation of the si^ecimen on two horizontal axes can be pcr- 



FiG. 37. 



formed as in the clamp fig. 36. The axis which is parallel to the long 

 diameter of the microtome is fixed by h. And in the same way h' 

 will free the axis which works vertical to the former. The screw 

 / moves the jaws g of the clamp, to fix the specimen. A is a part of the 

 carrier and C the micrometer screw which moves it. 



Fig. 38 represents a clamp devised by Dr. Meyer, of Naples. 



It can be turned round two horizontal axes, and the clamp can be 

 easily removed from the carrier. The axes of rotation are very near 

 to the cutting surface, which has certain advantages in adjusting 



