Bauhaus-Universität Weimar

Titel:
The Sciopticon Manual, Explaining Lantern Projections in General and the Sciopticon Apparatus in Particular Including Magic Lantern Attachments, Experiments, Novelties, Colored and Photo-Transparencies, Mechanical Movements, etc.
Person:
Marcy, L. J.
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit39449/58/
66 
SCIOPTICON MANUAL. 
scapes (except when clouds are present), perfectly clear 
glass. The particular tone requisite to suit the positive, 
is a matter of taste. A warm sepia will be found suit¬ 
able for most transparencies ; but each operator must 
exercise his own peculiar feeling in this matter. 
In making positives to be exhibited by the magic lan¬ 
tern, it is well to consider the variety of light to be used 
in projecting the picture upon the screen. Where pow¬ 
erful illumination, such as the oxy-hydrogen or magne¬ 
sium lights are used, positives may be made slightly 
stronger, showing more contrast than where a weaker 
form of illumination is employed. 
The slides should be protected from scratches and 
dust, by a piece of clear glass of the same size, neatly 
pasted on the edges with muslin. 
Positives on glass can also be made by the wet pro¬ 
cess, from negatives of the proper size, by pasting a thin 
strip of cardboard upon two edges of the negative (col¬ 
lodion side). The sensitive plate is prepared as usual, 
and is placed, while in the dark-room, in close contact 
with the negative, separated only by the cardboard. It 
is then exposed behind the negative, to diffused sunlight 
or artificial light, for a few seconds, returned to the dark¬ 
room, and developed. This plan admits of no change 
in the size of the negative. Mr. L. J. Marcy’s appara¬ 
tus for printing wet plates by lamp-light, has given sat¬ 
isfaction to many who have not an opportunity of mak¬ 
ing experiments by daylight. 
The proper size for glass pictures to be used in lan¬ 
terns of convenient proportions, is a debatable subject. 
Glasses of 31 x 31 being generally used, but advantages 
are claimed for a slide 81 x 41, that have some weight. 
In placing this slide in the lantern, the additional length 
of the glass allows the corners to be held by the thumb
        

Nutzerhinweis

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.