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MAGIC LANTERNS, STEREOPTICONS, ETC. 5 No. 2. Oxy-Hydrogen Stereopticon for Dissolving- Views, same as No. 1595, but has highlyq:>olished mahogany boxes, and clock for raising, lowering, and revolving the lime. Price, $325. The cost of the materials for making the oxygen and hydrogen gases, the alcohol and other incidentals attending the working of an Oxy-Hydrogen Stereopticon for dissolving views, is about $2.50 for every two hours' exhibition. Stereopticons with Hydro-Oxygen or Drummond Light. A first-class Stereopticon Apparatus, with 4-inch achromatic lenses, all the necessary gas apparatus, clock-work to move the lime, dissolving view cocks, &c. Price, $250 to $350. A cheaper apparatus, and without clock-work motion. Price, $125 to $150. The Stereopticon is a new instrument for producing magnified pictures and scenes on a wall or screen, for the entertainment of a large audience. Any one who has seen an exhibition of this ap- paratus must have been struck with the wonderful relief given to a landscape view, or a piece of statuary magnified fifteen to thirty feet high and proportionally wide, having, indeed, almost as perfect a stereoscopic effect as is produced by the Stereoscope itself. The cause of this stereoscopic effect is due, first, to the scenes and pic- tures being photographs from nature and solid objects, thereby being strictly correct representations both as regards light and shade, and true perspective ; second, to the great intensity of the light, by which the darkest portions of the picture are strongly illuminated ; and third, to the superior quality of the lenses with which the instrument is furnished. Any stereoscope picture on glass will answer for the Stereopticon, provided the ground or milky glass is removed from the back of the picture. These are equal to the English instruments in effect, and are furnished at a much lower price. In the Dissolving Views the change seems almost miraculous, for whilst observing a view of a castle, abbey, or ruin, the operator has the facility of changing in so gradual a manner to an entirely different view, as from day to night, exterior to an interior, or from one city to another, that the audience is completely bewildered ; and this is accomplished without leaving the room for one moment in darkness ; statuary is seen with remarkable effect, either upon a