204 BENJ. PIKE'S, JR., DESCRIPTIVE CATALOGUE. 



of which tube, and near that end which is nearest the light, 

 is a hole, to move the sliders in and out. A second tube 

 slides withinside the first. The requisite lenses are a thick 

 plano-convex lens at that end of the tube which is fastened 

 to the lantern ; and a double convex len. at the outer end 

 of the smaller tube. The slider of objects is placed in the 

 square hole prepared for it ; the light passes the plano- 

 convex lens, strikes the picture, and passes to the smaller 

 lens, whence it is cast on the white wall of an apartment, 

 or a sheet, or other screen. A better way of glassing the 

 lantern is described under the article " Improved Phantas- 

 magoria Lantern." 



These magic lanterns are handsomely japanned, having 

 oil lamp, reflector, a set of twelve sliders with mahogany 

 frames and box. 



Price, with 2 inch lenses, $ 5.50. 

 " 2| " " $ 8.00. 



" " 31 " " $10.50. 



" " 4 " " $16.00. 



Phantasmagoria Lantern. (Fig. 732, next page.) The 

 phantasmagoria lantern differs in no degree whatever from 

 the above, except the lenses being larger and the tube 

 holding them is made so as to project beyond the outer 

 lens, and the lens itself is made to slide readily and evenly 

 backwards and forwards, either by means of a rack and 

 pinion, or more simply by little studs, fastened on each side 

 of it, which pass through the sides of the tubes, and are 

 moved along by means of the finger. It also contains a 

 powerful solar lamp. Price, $15.00. 



