ELEMENTARY PHOTO-MICROGRAPHY. 97 



ings, printed in The English Mechanic, are posted 

 to country members. 



No entrance fee. Annual subscription, xos. 

 Address. 20, Hanover Square, London, W. 



The Royal Microscopical Society is the prin- 

 cipal society in the world, and its journal, issued 

 bi-monthly, contains up-to-date information in all 

 branches of microscopical work both here and 

 abroad. 



Entrance fee, two guineas. 



Annual subscription, two guineas. 



Address : 20, Hanover Square, London, W. 



