RPI This collection contains two student sketchbooks by Robert E. Powers, Class of 1940. One notebook, called Engineering Drawing, for a chemical engineering class, is dated 1936, shows drawings of graphs, geometry, projections, intersections, and isometric drawings. The second sketchbook, titled Free Hand Lettering, for a chemical engineering course, is dated 1940. The sketchbook contains various practice text to work on handwriting, as well as drawings of different buildings and motor parts from numerous angles.