Bind the holder tightly to the end of
the rod away from the pointer, so that one extremity just overhangs the
rod. A piece of thin elastic is tied to the unsharpened end of the pencil
and to the pencil tube, the adjustment allowing the pencil to project an
inch when the elastic is taut but not stretched.
A fairly soft pencil and a thick, smooth paper or card give the best
results. Paper should be backed by something hard to prevent the pencil
digging in. Attach the paper to a firm vertical surface, such as the side
of a box, a drawing board, a wall, etc.
Using the Machine.--The rod support, paper, and sitter should be arranged
so that the rod is level at the height of the sitter's nose and the pencil
on the centre of the paper. Bring the support near enough to the paper to
drive the pencil back into the tube until the point projects only half an
inch.
A thread attached to the pencil will enable you to keep the pencil off the
paper until you wish to begin drawing the profile.
Begin with the pointer pressing against the sitter's chest, and bring it
over the face and down the back of the head and neck.
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