THE BOOK OP THE LANTERN. 



215 



photo-micrography, which have been published, when they 

 feel themselves capable of 

 higher flights in this most 

 interesting domain 

 scientific research. 



The microscope which 

 I use is of a very ordinary 

 pattern, as may be noticed 

 in the diagram (fig. 53) ; 

 but three little alterations 

 in it make it very con- 

 venient for photographic 

 work. In the front leg 

 of the claw-shaped stand 

 a 3-16ths inch hole has 

 been bored, so that the 

 instrument can by means 

 of a screw be rigidly 

 fixed upon a base board. 

 The next alteration is in 

 the length of the tube. 

 Originally seven inches 

 long, I have had it 

 separated at nearly the 

 centre, so that it can be 

 reduced to three inches ; 

 but an inner tube over 

 which the outer one 

 tightly fits, allows me to 

 use the microscope for ordinary purposes with a tube of 



