Do not press it into
the hair, but carry it along what you consider to be the outline; though it
must be in actual contact with the features and clothes. It is hardly
necessary to mention that the sitter must keep perfectly still if the
silhouette is to be at all accurate.
The tracing is cut round with fine-pointed scissors, and the paper blacked
and stuck on a piece of white card. Some trouble is saved by using paper
white on one aide and black on the other. If duplicates are needed, two or
more pieces of paper should be stuck together by the corners and to the
paper on which the silhouette is drawn, and all be cut through at one
operation.
With a little practice the actual tracing of the outline occupies but a few
seconds. Things are expedited if an assistant adjusts the paper and pencil.
XXXVIII. A SIGNALLING LAMP.
Visual signalling is effected at night in the Morse code by means of a lamp
fitted with an easily-moved shutter, which passes or cuts off the light at
the will of the operator. Readers who know the Morse code might well go to
the trouble of constructing in duplicate the simple apparatus to be
described, as the possession of an outfit will enable them to extend their
signalling capabilities.
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