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Transactions of the Society. 



which bears upon six steel points let into the fixed brass ring. The 

 pinion for the rotation of the stage cannot, as in some other Micro- 

 scopes, be thrown in and out of gear, but the movement is so perfectly 

 adjusted that the stage can be rotated easily and smoothly without 

 handling the pinion. The only alterations that have been made in 

 this stand were at the author's suggestion, viz. 1st, a fine adjustment 

 was added to the substage in ] 882, this being the first Microscope to be 



Fig. 84. 



