45, CORNHILL, E.G., AND 122, REGENT STREET, W., LONDON. 



357 



FIG. 1764. 



PATENT IMPROVED LANTERN. 



1764 The great advantage of this Lantern is, that by means of its double changing 

 holder, working vertically, any framed slides (such as Rack work, Lever Action, 

 Changing Comic, &c,) can be shown one after another without any interval, thus 

 doing away with the unsightly white disc of light seen on the screen while 

 changing the slides in the ordinary single Lantern. 



With the Patent Lantern any Mechanical Slide can be introduced into a Lecture 

 set of Photographic Slides used with a carrier frame, without taking out the carrier, 

 by simply placing the Mechanical Slide in the bottom stage and raising it when 

 required into position, and then lowering the stages again to their former position ; 

 without having, during the change, shown any white light on the Screen, which 

 is impossible to do with an ordinary single Lantern. 



The Changing Holder is raised and lowered by a Lever which enables the 

 operator to either raise it slowly, so as to make the Slides exhibited appear like 

 a Panorama, or to raise it so quickly that the change from one slide to another is 

 almost imperceptible. 



The Patent Lantern is fitted with a 4-inch Condenser and Achromatic Com- 

 bination Front Lens, with large size lenses to the back combination (thus giving 

 greater light) and double pinions to the rack adjustment. It has a4-wick Paraffin 

 lamp, with wicks 2 inches wide (arranged to form 2 wedges, thus W, this preventing 

 the flicker of the wicks, seen on the Screen, when they are placed parallel to one 

 another), and a tall jointed Chimney, complete in Box. (fig. 1764) Price 880 



