. The art of projecting. A manual of experimentation in physics, chemistry, and natural history, with the porte lumière and magic lantern. is may be held in the re-tort-holder before mentioned^and set at such a distance infront of the hole that an ob-ject <r, when strongly lighted,.will be plainly projected uponthe screen s. The whole ofthe back on the in side shouldbe covered with white a black cloth flap hangover the hole at r, so that nolight will enter the room, savewhat is reflected from the il-luminated object. With these conditions adark photograph of an in-dividual, upon a
. The art of projecting. A manual of experimentation in physics, chemistry, and natural history, with the porte lumière and magic lantern. is may be held in the re-tort-holder before mentioned^and set at such a distance infront of the hole that an ob-ject <r, when strongly lighted,.will be plainly projected uponthe screen s. The whole ofthe back on the in side shouldbe covered with white a black cloth flap hangover the hole at r, so that nolight will enter the room, savewhat is reflected from the il-luminated object. With these conditions adark photograph of an in-dividual, upon a white background, will show quitewell. Objects held in the hand, such as a watch withits movements, cameo pins, small flowers, surface ofhalf an apple or orange. The latter, if squeezed whenbeing shown, presents a very amusing , crystals, shells, bright-colored beetles, bugs,butterflies, etc., may all be exhibited, and appear, withthe shades and shadows, like real objects. This con-stitutes the megascope. The accompanying cut (Fig. 24) represents thescenic effect of the human hand, as projected by themegascope. i. Fig. 23. THE VERTICAL ATTACHMENT. It is often very desirable to project such phenomenaas the ripples upon the surface of water, the move- PROJECTIONS. 41
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License: Licensed
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherbosto, bookyear1877
