BIRD-WORK FOR INDOORS 235 



the camera. To avoid the expense of two large 

 plates for each picture, make the positive by contact, 

 and enlarge for the negative. This can be done also 

 iwhen a 5x7 is to be made from a 4x5. 



By all means try lantern-slides. It is a very pretty 

 process, and may be made a very pleasant social 

 feature. Buy the regular lantern-slide plates, of the 

 uniform American size, 3% inches by 4. To use 

 them in the larger-sized plate-holder, either buy or 

 make a frame or " kit " which will hold them in 

 place, and mark off on the ground-glass in pencil the 

 exact range that it will occupy when in position to be 

 exposed. Then proceed exactly as above described, 

 either reducing the size if the whole picture is wanted, 

 enlarging if the image of the bird is too small, or, 

 as it is easier if the size be right, printing by con- 

 tact in the dark-room. Metol-hydro, of moderate 

 strength, makes a good developer, though hydroqui- 

 none by itself is safer for beginners, if the tempera- 

 ture of the room can be kept about 65 to 70 degrees. 

 Brilliancy and detail are desirable in lantern- 

 slides, and the skies usually should be clear glass. If 

 the slide is overexposed and blackens, do not hurry 

 it out of the developer, but leave it till the image is 

 very strong through the back, no matter how black 

 it gets. After fixing and before washing, clear it to 

 the right degree with the red prussiate before men- 

 tioned. This can also be used locally to wipe out all 

 fog from the sky by simply applying it with a swab 

 of absorbent cotton, not allowing it to run on the 



