CHAPTER VII. 



REQUISITES FOR DEVELOPMENT APPARATUS 

 CHEMICALS PRICES SUITABLE PLATES DE- 

 VELOPERS FOR NEGATIVES FOR LANTERN 

 SLIDES FOR BROMIDE PAPER KACHIN A UNI- 

 VERSAL DEVELOPER 



Many people have the impression that the work 

 of development must be carried on with a miserable 

 light from a ruby lamp, and consequently inflict 

 upon themselves trials of patience until a bad head- 

 ache compels them to stop, or their powers of en- 

 durance are exhausted. Never was a greater fallacy. 

 For ordinary plates a lamp may be used giving plenty 

 of yellow light, so 1 that everything can be plainly 

 seen, and all operations carried on with comfort. 

 Only when using chromatic plates is a red light 

 necessary. Even with this a lamp having a large red 

 glass front, not too deep, will give great relief, for 

 small lamps are an abomination. In cases where 

 a dark room is not available, the work can be done 

 at night in an ordinary bathroom. Gas is the best 

 illuminant, and lamps are sold that will give red, 

 yellow, or white light at pleasure, Failing gas, 

 the next handiest lamp is a candle lamp. Candles 

 worked by springs are apt to be very provoking. 

 The light sometimes either goes out or splutters 



