Mechanical drawing copy plates
A drafting course workbook of copy plates by Jesse Ephraim Rasmusen, issued in 1918 by the University Publishing Company of Chicago and Lincoln for engineering students at the University of Nebraska. The plates show machine parts in orthographic and isometric projection with section hatching, centre lines and dimension arrows, plus exercise sheets of concentric circles, tangent arcs and interlaced knots, all lettered by hand in block capitals.
