Bauhaus-Universität Weimar

Titel:
The Art of Projecting. A Manual of Experimentation in Physics, Chemistry, and Natural History with the Porte Lumière and Magic Lantern
Person:
Dolbear, A. E.
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit39441/29/
»24 ThE art of projecting. 
For holding pictures, and other objects, for projec¬ 
tion, the retort-holder will answer, in many cases, just 
as well as a more costly fixture. Not only may the 
larger pieces, such as photographic transparencies, 
leaves of trees, and the like, be held well in it, but 
microscopic specimens in glass slides, also small un¬ 
mounted objects, such as parts of flowers, insects, etc., 
_____ ^ may be held in 
— small forceps 
Fig, 16, (Fig. 16), which 
in turn may be held in the retort-holder. It will be 
found convenient to have as many as three of the 
latter. 
PROJECTIONS. 
TO PROJECT WITH THE PORTE 
SINGLE LENS. 
LUMIERE AND A 
Fasten the porte lumière in its place, and so adjust it 
that the beam of light / (Fig. 17) is reflected horizon¬ 
tally, and falls upon the screen s. It will appear as 
a bright spot, 
H five or six inch¬ 
es in diameter. 
Darken the 
room, by draw¬ 
ing the curtains 
or closing the 
shutters, and 
the beam of 
light can then 
Fig. 17,
        

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