ELEMENTARY PHOTO-MICROGRAPHY. 8/ 



and the exposure made before lowering the 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 distinguish 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, 

 face up, in the fixing bath made up as follows : 



Hypo . . . . . . 4 ounces. 



Water 16 



