INTRODUCTION. O 



strain by the study of microscopy, for, from what 

 has been said, the advantages of photography to the 

 Histologist, Pathologist, and student of Natural 

 History, are so obvious, that any tendency to extend 

 its domain to amusement might injure its prestige 

 with students of science. 



In the following chapters besides the methods we 

 have ourselves adopted, it has been our aim to 

 gather together those used by others, and after ana- 

 lysing them to choose the parts most applicable, 

 when considered in conjunction with the recent ad- 

 vances of photography; at the same time by 

 showing the facility of their application, we hope to 

 make photo -micrography more popular, and place it 

 within the reach of all. 



B 2 



