Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 95
5 3 1 E Fig. 20.5. On BC construct a rectangle ABCD with EI asits altitude. Divide AB and BE into the same number cfequal parts, say 5. Divide DC and EC in like manner. From F draw lines to the points of divi-sion on BC. From the points of division on ABand DC draw lines to I. Through the… … Fig. 20fi. To construct a spiral composed of arcs of variousradii. Let ABC be a small equilateral triangle, Fig. 206. Note —A spiral is a curve described about a fixed point, and whichmakes any number of revolutions around that point without returninginto itself. ROGERS DRAWING AND DESIGN. 109…
Mechanical drawing · Machine design
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