ELEMENTARY PHOTO-MICROGRAPHY. Il'J 



development without a dark room lamp, but it 

 is decidedly advisable to work with a good lamp 

 that gives plenty of safe light. When held flat 

 in the hand, bromide paper will curl slightly 

 with the sensitised surface inside. Wetting the 

 corners with thumb and finger in order to dis- 

 tinguish the different sides is not a clean habit, 

 but the paper may be held between the teeth 

 at one corner, when the sensitised surface will 

 stick to the teeth. 



The exposure depends on the negative, but for 

 average density the Velox carbon takes twenty 

 seconds at six inches from a No. 5 burner. A 

 thin negative should be held further away from 

 the light ; a dense one, nearer. The frame is best 

 kept between the eyes and the gas to shade the 

 eyes during exposure, and if frequent exposures are 

 made at one time, neutral tint spectacles during the 

 time the light is full on will be found a relief. 

 Having made the exposure and lowered the light, 

 the paper is taken from the frame and dipped into 

 clean water, so that it will lie flat in the developing 

 dish. The developer is swept over the paper, 

 keeping it freely on the move until the required 

 depth of tone be reached, when the paper is 

 rinsed in clean water and immersed edgewise, 



