The first requisite of style is choice of words, and this comes under the head of Diction, the property of style which has reference to the words and phrases used in speaking and writing. The secret of literary skill from any standpoint cons... Read more of DICTION at Speaking Writing.comInformational Site Network Informational
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Illuminated Prospects








Provide yourself with some of those prints that are commonly used in
optical machines, printed on very thin white paper; taking care to
make choice of such as have the greatest effect from the manner in
which the objects are placed in perspective. Place one of these on the
borders of a frame, and paint it carefully with the most lively
colours, making use of none that are terrestrial. Observe to retouch
those parts several times where the engraving is strongest,[D] then
cut off the upper part or sky, and fix that on another frame.




The prints being thus prepared, place them in a box, A B C D, Figs. 14
and 15, the opening to which, E F G H, should be a little less than
the print. Cover this opening with a glass, and paint all the space
between that and the prints, which should be about two or three
inches, black. The frame that contains the sky should be about an inch
behind the other. In the back part of this box, which is behind the
prints, and which may be about four inches deep, place four or five
small candlesticks to hold wax lights, and cover that part entirely
with tin, that it may be the more luminous.

When the print is placed between the wax lights and the opening in the
front of the box, and there is no other light in the room, the effect
will be highly pleasing; especially if the lights are at a sufficient
distance from each other, and not too strong, that they may not
occasion any blots in the print. Those prints that represent the
rising or setting of the sun will have a very picturesque appearance.
Such as represent conflagrations have also a striking effect.

There should be two grooves for the print next the glass, that you may
insert a second subject before you draw away the first; and that the
lights in the back of the box may not be discovered.

You must not, thinking to make the print more transparent, cover it
with varnish; for that will prevent the gradation of the colours from
being visible. The frame should enter the side of the box by a groove,
that a variety of subjects may be introduced.

[D] When you colour a print, place it before you, against a
piece of glass, in a position nearly erect, that it may be
enlightened by the sun. You may also colour both sides of the
print.




EXPERIMENTS IN MAGNETISM.





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