A portrait of W.J. Proudfoot (oil on canvas).

A letter written by Dinwiddie dated January 24, 1791

A syllabus of a course by James Dinwiddie.

These lecture notes written by James Dinwiddie in 1793 focus on optics. Dinwiddie discusses the properties of various instruments including microscopes, telescopes, and magic lanterns as well as convex and concave lenses. ...

These lecture notes written by James Dinwiddie ca. 1793 focus on trigonometry. The notes begin with a series of definitions of angles, circles, and trigonometric measurements. They go on to mention various corollaries and ...

These notes written by James Dinwiddie ca. 1793 contain a series of calculations of distance using the Mitchell Method. This file consists of nine pages of notes.

These notes written by James Dinwiddie ca. 1793 titled "Recreations" contain several mathematical puzzles, such as magic squares, and other mathematical facts. This file consists of twelve pages of notes.