361 



1772 Negretti and Zambia's Improved 

 Tri-Unial Lantern (fig 1772) for ex- 

 hibiting Dissolving Yiews and Effects 

 by the Oxy- Hydrogen Lime -Light. 

 Best 4-inch Condensers. Polished 

 Mahogany Lanterns, with Brass Fronts, 

 Hackwork and Sliding Tubes for adjust- 

 ing the Front Lenses for varying 

 distances^from the screen. A set of 3 

 Achromatic Lenses being supplied 

 giving pictures at a range of from 20 

 to 120 feet. 



Price for the set in its most 



i 



complete form, including Gas generat- 

 ing and Purifying Apparatus, 2 stout 



y Gas_Bags,[&c., &c. (fig. 1772) 



Price 46 10 



FIG. 1771 

 FIG. 1773. 



1773 Improved Apparatus for exhibiting OPAQUE OBJECTS, magnified by 



the Oxy-Hydrogen Light, upon a Screen in their natural colours 

 (fig. 1773), Complete 26 5 



1774 The Aphengescope, a small modified arrangement of the above Apparatus, 



adapted for use with a pair of Dissolving Yiew Lanterns .220 

 Ditto ditto for a Single Lantern (fig. 1774) . . . 18 6 



These effects can only be well exhibited by the Oxy-Hydogen or Oxy-Calcium Lights. 



