. The art of projecting. A manual of experimentation in physics, chemistry, and natural history, with the porte lumière and magic lantern. Fig. 68. The image formed in front of the concave mirrormay be seen by letting a strong light fall upon theobject and having the mirror above it, as the object 0 be inverted and hidden otherwise fromview, it will appear upright; and at 0, to one standingin front of the mirror, all in a room can be made tosee it by turning the mirror a little, so it will face them. 92 THE ART OF PROJECTING. A small bunch of flowers, a statuette, the hand, etc.,a
. The art of projecting. A manual of experimentation in physics, chemistry, and natural history, with the porte lumière and magic lantern. Fig. 68. The image formed in front of the concave mirrormay be seen by letting a strong light fall upon theobject and having the mirror above it, as the object 0 be inverted and hidden otherwise fromview, it will appear upright; and at 0, to one standingin front of the mirror, all in a room can be made tosee it by turning the mirror a little, so it will face them. 92 THE ART OF PROJECTING. A small bunch of flowers, a statuette, the hand, etc.,are good objects to exhibit this property. Images can likewise be projected upon a screen bymeans of the concave Fig. 69. At a distance six, eight, or ten feet from a screenhold a lighted candle close in front of the mirror;slowly separate them : the image of the light willappear inverted upon the screen, and much is taken of this property of the concavemirror to project some phenomena, such as manome-tric flames, etc., which see. CAUSTICS BY REFLECTION. A concave polished surface, like a strip of tin, twoor three feet long and an inch or two wide, bent into
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherbosto, bookyear1877
