10 PBACTICAL PHOTO-MICEOGKAPHY 



Messrs. Swift have recently introduced a modification of the 

 fine adjustment, so that it can now be obtained in the same 



FIG. 1. Wales type of Microscope. (Messrs. J. Swift & Son.) 



position as on Continental models that is, in a position facing 

 the observer when using the microscope. The fine adjustment 

 is slow and thoroughly steady in use, and when the highest 

 powers are being used, works with perfect steadiness. The 



