82 PHOTOGRAPHIC PROCESSES. 



silver (prepared according to formula given) in six 

 ounces in water. Place the pitcher containing the 

 gelatine in hot water do not let the temperature 

 exceed 110 degrees. When the gelatine is all dis- 

 solved, which will take about fifteen minutes, add 

 the silver solution to the warm gelatine ; rinse out 

 the vessel you dissolve the silver in with two ounces 

 of water, and add it to the gelatine solution ; when 

 the silver is added it will immediately turn white (if 

 it turns brown the gelatine is not good, and must be 

 discarded). Stir well. Now take a bowl large 

 enough to hold the emulsion, wax it inside with 

 beeswax, being careful not to leave an excess of 

 wax ; this is to keep the emulsion from sticking to 

 the bowl. Pour the silvered gelatine into the bowl 

 and set away in a temperature of 40 to 60 degrees 

 to set. When this becomes a jelly, which will take 

 about four hours, cut it into strips about one- fourth 

 inch square, using a silver knife or horn spatula. 

 Put strips of silver gelatine into a half-gallon 

 pitcher, put pitcher into the washing box (described 

 hereafter), put on covering and pour the following 

 solution through the pipe into the pitcher on to the 

 gelatine. 



Soda carbonate, 150 grains. 

 Ammonium bromide, 720 grains. 

 Alcohol, 4 ounces. 

 Water (about 60 to 70 degrees) 12 ounces. 



Stir this every half-hour for two hours. When 

 you stir it, take washing box into dark room, shut 



