MICROSCOPIC MOTION PHOTOGRAPHY 105 



hard to say the mountings may cost up to $300 

 and if you are doing it for a life work it is well spent, 

 even considering that a homemade wooden outfit 

 may cost only $5. 



Microscopic Motion Photography is a science re- 

 quiring the greatest amount of skill and patience, 

 combined with an immense amount of special ap- 

 paratus. A microscopic unit is never complete, each 

 subject is apt to require some special device, and 

 must be so assembled that you can photograph any- 

 thing as large as a fly down to the bacteria that de- 

 velop under a hair on his toe, and to be usable at 

 distances of from i mm. to infinity. I can picture the 

 moon with mine, getting an image to nicely fill the 

 field. 



For real service, you must be able to get a focus 

 with direct or dark field illumination with magnifi- 

 cation from the original size up to 1,500 times, 

 within twenty seconds of placing the subject on the 

 stage. The stage itself should have mechanical up 

 and down and horizontal as well as revolving move- 

 ments and all so arranged that these may be motor 

 driven at any speed. This is necessary if you wish to 

 make steady panoramic motion pictures, as it is im- 

 possible to turn the small adjusting screws by hand 

 and get a steady picture. 



Both microscope and camera should be on car- 



