81 



On a New Arrangement of Growing Slide, designed by the 



Rev. A. Pagan, B.A. 



Communicated by T. Spencer Smithson. 



(Read March 25th, 1887 J 



This slide was designed mainly for the purpose of watching 

 the development of Rotifers and other organisms which require 

 a constant change of water. The above figures give the 

 essential points of its construction, which is very simple, and 

 so far effective as to have enabled Mr. Pagan to observe the 

 growth of the spores of vohox globator after they had been 



