Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 42
. Thecircumference of an octagon is equal to the sumof the length of the sides. Octagon: Area^.828 D^Circ.=8 S^=.414 P MENSURATION OF VOLUME AND SURFACEOF SOLIDS. To find the cubic contents of a sphere—Fig. 99. Multiply the cubic of the diameter by .5236. To find the superficial area of a sphere.…
Mechanical drawing · Machine design
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