248 



THE BOOK OF THE LANTETN. 



manner. It will be noticed that behind the objective is 

 placed a sloping mirror, which reflects the light upon the 

 card, photograph, or other object above it. The objective 

 is then shifted from its usual position to an orifice above, 

 which is shown in the cut with a stopper in it. This 

 lantern the design of Laverne & Co. is lighted by a 

 mineral oil-lamp, but, obviously, the limelight could be 

 adapted to it. Mr. Medland, of the Borough, has intro- 

 duced a lantern on the same principle, see fig. 65. So much 



FIG. 65. 



light is necessarily absorbed by the arrangements of the 

 opaque lantern, even in its best forms, that the brightest 

 of illuminants must be secured to give it full effect. 

 It is on record that some years back a form of opaque 



