Scientific amusements . HAND SHADOWS. 137. 138 OPTICAL APPARATUS. of glass between the spectators and the stage. The stronglight throws a reflection from a parallel mirror lower down,and this reflected image can he made to appear amongstthe real actors who are behind the plate-glass in full viewof the audience, who are, however, ignorant of the existenceof the glass screen. For the winter evenings one may easily procure anapparatus for dissolving views by the oxy-hydrogen , as shown in the illustration herewith (see oppositepage), will answer every purpose, and by this double arrange-
Scientific amusements . HAND SHADOWS. 137. 138 OPTICAL APPARATUS. of glass between the spectators and the stage. The stronglight throws a reflection from a parallel mirror lower down,and this reflected image can he made to appear amongstthe real actors who are behind the plate-glass in full viewof the audience, who are, however, ignorant of the existenceof the glass screen. For the winter evenings one may easily procure anapparatus for dissolving views by the oxy-hydrogen , as shown in the illustration herewith (see oppositepage), will answer every purpose, and by this double arrange-ment phantasmagoria may be produced, or a fairy tale maybe illustrated. The effect of gradually-approaching nightmay be given to the picture by means of a special glassin the lower lanthorn. The apparatus is exhibited bymeans of a Drummond light, and is very simple, althougha certain supply of gas is necessary for the this can be easily procured by an indiarubber tube,or in a bag supplied for the purpose. Almost any object
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Keywords: ., bookcentury1800, bookdecade189, booksubjectscientificrecreations
