Johnston, Philip Devereux, 1855- · New York, D. Williams Company · leaf 108
I04 A MANUAL OF MECHANICAL DRAWING. Plate 33. To Lay Out the Envelope of a Cone. Fig. 38. Draw cone ABC. With vertex A ascentre and A C as radius draw arc C D, Make C Dequal to circumference of base B C, and draw A D.To lay out the envelope of a hexagonal pyramid:Fig. 39. Draw semi-circle on base B…
Mechanical drawing
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