Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 33
find the length of an arc of a circle^—Fig. 64.Divide the chord AC of the arc into four equalparts as shown. With the.radius AD equal toone-fourth of the chord of the arc and with A asthe center describe the arc DE. Draw the line EGand twice its length will be the length of the arcAEC. To draw… … Fig. 65.
Mechanical drawing · Machine design
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