1 8 ELEMENTARY PHOTO-MICROGRAPHY. 



objects to be photographed, the study of which 

 should be continued with their delineation. 



Thus pleasure and knowledge will go together, 

 and every step will prove an incentive to further 

 progress. 



On the other hand, if the worker takes up the 

 matter as one merely for amusement, he is not 

 likely to master the difficulties that will present 

 themselves sooner or later, failing which he is the 

 more likely to get tired and discouraged. 



The business man as well as the professional man 

 will find endless ways of turning the microscope to 

 profitable account, when once the art of illumination 

 and knowledge of correct exposure are overcome. 



The telescope and spectroscope used in con- 

 nection with the camera have been made to yield 

 most important facts ; but probably no branch 

 of the photographic art has received more ex- 

 tended application or given more valuable results 

 than that of photo-micrography, which enables 

 the microscopist to secure a wealth of detail from 

 the minute forms of life quite impossible by any 

 system of sketching through a camera lucida. 



Think of the advantages to be derived from 

 a photograph when any disputed point arises, 

 as it often does, in the structure of an organism. 

 One observer says he sees a certain formation, 

 while another sees. something quite different. 



