Bauhaus-Universität Weimar

The Art of Projecting. A Manual of Experimentation in Physics, Chemistry, and Natural History with the Porte Lumière and Magic Lantern
Dolbear, A. E.
inches in diameter, with a focus of from eighteen to 
twenty-four inches, will be found best for the purpose. 
This may be held in the re¬ 
tort-holder before mentioned* 
and set at such a distance in 
front of the hole that an ob¬ 
ject cy when strongly lighted* 
will be plainly projected upon 
the screen s. The whole of 
the back on the in side should 
be covered with white paper. 
Let a black cloth flap hang 
over the hole at r, so that no 
light will enter the room, save 
what is reflected from the il¬ 
luminated object. 
With these conditions a 
dark photograph of an in¬ 
dividual, upon a white background, will show quite 
well. Objects held in the hand, such as a watch with 
its movements, cameo pins, small flowers, surface of 
half an apple or orange. The latter, if squeezed when 
being shown, presents a very amusing appearance. 
Minerals, crystals, shells, bright-colored beetles, bugs,, 
butterflies, etc., may all be exhibited, and appear, with 
the shades and shadows, like real objects. This con¬ 
stitutes the megascope. 
The accompanying cut ( Fig. 24 ) represents the 
scenic effect of the human hand, as projected by the 
megascope. t 
It is often very desirable to project such phenomena 
as the ripples upon the surface of water, the move- 
Fia. 23.


Sehr geehrte Benutzer,

aufgrund der aktuellen Entwicklungen in der Webtechnologie, die im Goobi viewer verwendet wird, unterstützt die Software den von Ihnen verwendeten Browser nicht mehr.

Bitte benutzen Sie einen der folgenden Browser, um diese Seite korrekt darstellen zu können.

Vielen Dank für Ihr Verständnis.