This is an instrument in four sections, so arranged that you can enlarge
or diminish in size, and copy a photograph, engraving, or any kind of
picture. It contains a screw to fasten it to the table, a small steel
needle to guide in the outlining, and a lead pencil to do the drawing.
=How to Use it.= Screw the Pentagraph to the table, with the needle
point to your left, upon the photograph, (which is fastened to the table
also), holding the end containing the pencil with the fingers, to the
right. With your eye on the photo, move the hand so that the needle
follows the outlines of the copy, and the pencil is producing the same
on your drawing paper at the right. In this way go over the entire
picture until you have a complete copy of the same. You may now shade
with pen or crayon to suit the wants of the copy.
The small screws on the bars near the figures, are used in adjusting it
to suit the size of picture required.