178 



Transactions of the Society. 



X. — Adams's " Variable " and the Evolution of the 

 Modern Microscope. 



By Edwaed M. Nelson. 



(Read March 15, 1911.) 



This Microscope * (fig. 27), designed in 1770 by an anonymous " noble 

 person," and made by George Adams, is by far the most important 



Fig. 25.— Watkins, 1755. 



* Micrograph ia Illust. Adams, 4th ed., 1771, pi. ii., 60 Fleet Street. 



