ELEMENTARY PHOTO-MICROGRAPHY. 



provided. This will slip into the 

 grooves, fig. 4, whilst the focus- 

 sing is completed. 



The cameras and lantern should 

 be placed as shown in fig. 5, 

 with the centres all in the same 

 line. A is the enlarging camera, 

 B the small camera, C the 

 ground-glass, and D the lantern 

 with its front lenses removed. 



A lantern with incandescent 

 light is effective and clean, and 

 Fig. 4. is got reac iy w j t h ij tt i e trouble. A 



rubber tube being connected to the nearest gas 

 bracket, the light may be turned on or off at a 

 moment's notice. An acetylene lamp also gives a 

 bright light, but is more troublesome, and cannot be 

 left burning during development if all the processes 

 be carried out in the same room. If a lantern be not 



Fig. 5. 



available, magnesium wire will answer, though the 

 smoke from this is objectionable in ordinary house- 

 holds, where it is presumed the reader will usually 

 work. 



