860 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



Watson-Wale Microscope. — Fig. 185 shows a modification of 

 G. Wale's " Working Microscope," * devised by Messrs. Watson and 

 Sons. 



Instead of the limb sliding between jaws, as in the original form, 

 the new instrument has a slot cut through the limb, which slides on 



Fig. 185. 



the axis of inclination, a clamp-screw fixing it at the required position. 

 The limb may also revolve on the inclining axis without sliding 

 upward or downward, but in this case the instrument is less stable. 



The " Zentmayer " system of fine adjustment is applied. The 

 stage rotates completely and has a glass surface on which Tighl- 



* See this Journal, iii. (1880) p. 1045. 



