Simplified mechanical perspective for the use of ... schools
A drawing-instruction manual on mechanical perspective by Frank Forrest Frederick, published in Peoria, Illinois by the Manual Arts Press in 1909 for manual-training and art students. The plates are numbered line diagrams in plain black on white: plan views above, horizon lines, vanishing points, cubes, cylinders and prisms tied together by long converging construction lines and dotted projectors, useful as geometric line art, technical-drawing backgrounds, or lettered diagram fragments.
