OP MAGIC LANTEKNS, ETC. 



153 



FIG. 1812. 



1812. Casella's Improved Dissolving View Apparatus, with condensing lenses 3^-inch. 



diameter, dissolvers moved by rackwork, improved solarized Argand fountain 

 lamps, suitable for lectures or parlour use, and capable of showing with clear- 

 ness and brilliancy any of the pictures or views referred to in this catalogue, 

 in case complete (fig. 1812) . . . . . 880 



1813. DISSOLVING VIEW APPAEATUS, as above, with French polished tin lined maho- 



gany bodies to the lanterns to prevent heating, the whole packed in case, as 

 adapted by the Hon. Council of Education . . 10 



This apparatus, as well as the next following, is strongly recommended and particularly 

 adapted for the purposes of instruction or amusement, where the expense or treatment of the 

 oxyhydrogen or oxycalcium lights cannot be conveniently undertaken. 



1814. DISSOLVING VIEW APPAEATUS, with condensing lenses, 4|-inch. diameter, rack 



adjustment to focus the object tubes, improved solarized Argand fountain 

 lamps, with stout mahogany bodies, etc., in case complete . 12 12 



The improved oxy-calcium light may be applied at pleasure by the purchaser to any of 

 the lanterns from No. 4 inclusive, they being equally adapted for this or the Argand lamps 

 which accompany them. 



1815. The apparatus complete for one lamp, 5 5s. ; for two lamps, 6 6s. ; see Nos. 



1822 to 1828, and/#s. 1822, 1825, 1827, and 1828. 



1 816. Improved Oxy-Hydrogcn Dissolving View Apparatus, adapted for lectures and 



public institutions, condensing lenses 6 inch, in diameter, with best mahogany 

 bodies, brass fronts and rack adjustment, gas jets, best indiarubber gas bags, 

 to contain supply for two hours, pressure boards, clockwork movement for the 

 lever cylinder, gas retorts for the oxygen and hydrogen gases, flexible con- 

 necting tubes with stop-cocks, etc., complete in case, with plain instructions 

 for making the gas, etc., etc. ..... 36 



