DISSOLVING VIEWS. 



is placed in front of the nozzle of each, of the lanterns, and these 

 are moved simultaneously in such a manner, that when the nozzle 

 of one lantern is completely opened, that of the other is completely 

 closed, so that, according as the former is gradually closed, the 

 latter is gradually opened. 



10. To illustrate this class of effects, which always create an 

 agreeable surprise, let us suppose that two sliders are placed in the 

 lanterns, one representing a landscape by day, and the other 

 representing precisely the same landscape by night, and let the 

 nozzle of that which contains the day landscape be opened, the 

 other being closed : the picture on the screen will then represent 

 the day landscape. If the covers of the nozzles be now slowly 

 moved, so that that of the lantern which shows the day landscape 

 shall be gradually closed, and that of the other shall be gradually 

 opened, the eifect on the screen will be that the day-light will 

 gradually decline, the view assuming, by slow degrees, the appear- 

 ance of approaching night. This gradual change will go on, until 

 the nozzle of the lantern containing the day picture has been 

 completely closed, and that containing the night picture com- 

 pletely opened, when the change from day to night will be 

 accomplished, the picture on the screen being then a night 

 landscape. 



An infinite variety of amusing effects of other kinds are 

 contrived by accessories combined with such pictures. Thus, 

 for example, a view, exhibiting a landscape in bright sunshine, 

 becomes gradually clouded and obscure, and snow begins visibly 

 to fall ; the darkness increases, night comes on, the moon rises, 

 illuminating the landscape, which now appears covered with 

 snow. The wheel of a mill, which was moved by a stream, 

 which seemed flowing in the sunshine, is now at rest, loaded with 

 snow and icicles ; the stream no longer flows, but is frozen. 



All these effects are produced by two or more lanterns, the 

 mill-wheel is a little metal- wheel attached to that part of the 

 slider on which the mill is delineated, and kept in motion by 

 wheel-work impelled by the hand of the exhibitor. The fall of 

 snow is produced by a sheet of blackened paper, pierced with a 

 multitude of little holes, and moved before the lamp by means of 

 rollers at the top and bottom; the light passing through the 

 holes forms white spots, which are projected on the screen, and 

 which appear to fall like snow-flakes. The clouds pass over the 

 sun or moon, or move from them so as to cover or unveil them, 

 by the motion of a second slider behind the first. 



Another class of appearances is produced by one of the 

 exhibitors managing with address a small supplemental lantern. 

 Thus, for example, the picture of a castle, with portcullis and 



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