i6 



HOW TO PHOTOGRAPH 



ance after it has been in the developer 

 about a minute, add the remaining k ounce 

 of the ammonia solution. The image will 

 then slowly appear, if the plate has been 

 properly exposed; but if under-exposed, 

 only further doses of ammonia will bring it 

 out. In the latter case, take no further 

 trouble with the plate, but at once expose 

 another, for an under-exposed plate is sim- 

 ply useless. 



It will be found in developing some neg- 

 atives that one part will develope more read- 



ily than another, and become so dense as 

 to be quite unprintable. The photograph 

 given below (parasite of ox) is an example 

 of tliis On developing, the body appeared 

 first, and became of an alarming blackness 

 before the legs had got little more than 

 their outline. The developer was at once 

 thrown off, and the negative well rinsed in 

 water. Fresh developer was made up, and 

 the tray tilted up, so that when the nega- 

 tive was again placed in the dish the devel- 

 oper would cover the parts only partially 



PARASITE OF OX. 2-inch ohj. 



developed, which in this case were the head 

 and legs. The dish was gently rocked all the 

 time, and the negative, when finished, was 

 of uniform density. By this means the 

 after reduction of the negative was avoided. 



If the development proceed satisfactorily, 

 don't be in any hurry to take the plate from 

 the developer ; over-development will not 

 do much harm, while the contrary would 

 ruin it. When all the details are well out- 

 examine the plate, by holding it up before 

 the lamp. Should it prove sufficiently 



dense, rinse it in water, and place it for a 

 minute in a solution of alum and citric 

 acid ; wash again, and put it in another 

 dish containing hyposulphite of soda made 

 up thus : 



Hyposulphite, 

 Water, . . 



4 ounces. 

 20 " 



When the creamy bromide of silver is dis- 

 solved, which may be known by the plate 

 becoming quite clear and transparent, place 

 he negative in fresh hyposulphite for a few 



