236 HOW. TO STUDY BIRDS 



wrong place, and having water for rinsing ready for 

 instant use. 



It is easy to learn to color lantern-slides success- 

 fully, which adds much to their popular effectiveness 

 if reasonably well done. I recommend the so-called 

 Japanese transparent water-colors which come in 

 booklet form, with the coloring matter deposited on 

 the pages, tiny pieces being snipped off and put into 

 water. It is very fascinating work and not difficult. 

 Buy with the colors a booklet about coloring lantern- 

 slides and try it. One can also in the same way 

 utilize the positives made in enlarging for trans- 

 parencies, to be hung before lamp or window, colored 

 if one wishes, and bound with a plain glass over 

 the film in front to protect it and a ground glass 

 behind to show off the picture better, unless it is to 

 be in front of a lamp shade, when the latter will not 

 usually be necessary, and perhaps not any way. 



For prints to be colored, a paper with a non-glossy 

 matte surface should be used. Matte velox or sim- 

 ilar paper is good, but platinum, though expensive, 

 is the best and most durable. Platinum requires a 

 plucky or brilliant negative as for solio, and velox a 

 soft negative, with good detail but not too strong 

 contrasts. If the negative is intended for velox, the 

 development of the plate should be stopped sooner 

 than otherwise. For coloring prints the ordinary 

 best water-colors should be used, and not the trans- 

 parent lantern-slide colors, which presumably are all 

 aniline, and would probably tend to fade if kept in 



