366 



Society the results of his experiments. They were : 1st — Nitric Acid ; 2nd— 

 Strong Soda ; 3rd — Plain Washing Soda. 



To Mr. Furlong I am indebted for the rough material you see. 



Since Mr. Furlong died, the Polycislina have been made even more beautiful 

 for the microscope. They are separated by the soda process, then put on a 

 platinum plate, calcined by excessive heat, the result being that instead of the 

 somewhat glassy appearance of the specimens, they are made into china, and are 

 very superb as dark-ground illuminated objects. 



