Construction of Geometric Revolution Small 320×320 Medium 639×640 Large 1023×1024 Download Tiff Original 2400×2403 | (223.6 KB) Description "The distance of A and B below H is indicated on the V projection. Thus if to A∧h B∧h the perpendiculars A∧h A;and;r and B∧h B∧r be drawn, A∧r B∧r will be the true length of A B." —French, 1911 Keywords Axis Revolution, geometric revolutions, geometry, plane, planes, revolution about axis, Revolution About Axis Perpendicular into Plane, revolution of axis Galleries Proportions Source: French, Thomas E A Manual of Engineering Drawing for Students and Draftsmen (New York, NY: McGraw-Hill, 1911) Courtesy the private collection of Roy Winkelman