20 ELEMENTARY PHOTO-MICROGRAPHY. 



and duration, become more than futile academic 

 questions. 



In every direction there are unknown facts 

 awaiting discovery, and every diligent student, 

 even if an amateur, will find a reward. 



Many persons confuse the terms photo-micro- 

 graphy and micro-photography, so it may be well 

 to explain that these are by no means identical. 

 A micro-photograph is a picture of a large object 

 reduced to microscopic size : such, for instance, 

 as York Minster shown the size of a pin-head, 

 whilst a photo-micrograph is a magnified view of 

 a tiny object the photographs in each case being 

 reduced or enlarged through the microscope. 



The results of photo-micrography (pronounced 

 foto-mi-krog-ra-fi) are indisputable, and are far 

 more faithful than any sketches made by the most 

 skilled artist. 



Some of the beautiful pictures drawn by means 

 of the camera lucida, and used as illustrations of 

 microscopic objects, stand only in the same posi- 

 tion as faked photographs, for the objects them- 

 selves never appear trimmed up in such a 

 mechanical manner, hence the camera lucida, that 

 did so well for our fathers, is now a thing of the 

 past, except where simple outlines only are wanted. 



Dr. Bousfield writes very emphatically on this 

 subject when he points out that the average 



