PRINTING METHODS LANTERN SLIDES 1 17 



first trial, but, as in all of our other opera- 

 tions, a little patient work will make perfect. 

 It would be well to practice with a dummy 

 slide until the "knack" is acquired. Now 

 come the finishing touches. Lay the slide 

 flat upon the table, cover side up, and with 

 the top of the picture as you wish it to appear 

 upon the screen also at top of slide as it lies 

 before you. In other words, it should be 

 in exactly the position you desire it to 

 occupy on the screen. Then gum a circle or 

 square of white paper to the lower left-hand 

 corner, as shown in Fig. 27. Now turn the 

 slide over from top to bottom (not from right 

 to left), and gum the label on left-hand side, 

 as shown in Fig. ,28, which will bring it over 

 the spot on face of slide. If then the opera- 

 tor, when putting a slide into the carrier, does 

 so with this spot label always on top and 

 facing the screen, the picture must be pro- 

 jected right side up and just as you have 

 designed it to be shown. 



The picture on a lantern-slide must fill 

 either the entire space of cut-out in the mask 

 or only a portion thereof with a margin of 

 clear glass or slightly tinted, as the negative 

 may be more or less dense. The appearance 

 of such a slide as the latter, is greatly marred 



