212 



PREPARATION OF LANTERN SLIDES 



[Cn. VIII 



Projecting, Deschanel's Physics, etc., 

 and fig. 141, 190, 211, 214. 



There is one serious drawback to such 

 lantern slides. The background being 

 nearly opaque stops the light and other 

 radiant energy from the lamp, and the 

 great heat developed is 

 liable to crack the slides 

 (see 18, 845). 



FIG. 1 19. FOLMER & SCHWING'S TILTING CAMERA AND ADJUSTABLE BACK. 



(From the Catalogue of Folmer & Sch-wing. Cut loaned by the Eastman 



Kodak Co.). 



A Tilting camera for making lantern slides or other transparencies with an 

 objective, or for photographing objects in a horizontal or inclined position. 



B Adjustable back for the tilting camera. The adjustments are to the 

 right or left, up or down and enable one to center accurately any desired part 

 of the negative or other object to be photographed. The rotary motion of the 

 back enables one to get the lines on the negative or object exactly parallel with 

 the edge of the lantern slide. 



