1To Thomas Jefferson from Charles Willson Peale, 28 January 1803 (Jefferson Papers)
The Physiognotrace invented by Mr. Hawkins is made strong, because subject to be handled by all sorts of People that visit the Museum—The enclosed drawing and explanation of it, is rough, but correct—and I hope will give you a perfect Idea of all the essential parts of it. Mr. Hawkins has also contrived another Index, which is designed to give the lines of a ¾ face; the lines of the hair,...
2Description of the Physiognotrace (Jefferson Papers)
Explanation of Mr. Jno. I. Hawkins Physiognotrace A is a board that mooves up and down in the frame B, B. which is fastened to the wall with brackets C, C,— This moovement is convenient to suit the heigth of different persons, and it is secured to its place by means of a screw on the back part,—D, is a hollowed board projecting 2½ Inches, to allow the Pentagraph to moove behind it. The person...