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Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments. Elementary instruction in practical mechanical drawing. Together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers (1889)

Rose, Joshua · Philaelphia, H.C. Baird & co.; [etc., etc.] · leaf 70

An illustration from Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments. Elementary instruction in practical mechanical drawing. Together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers, 1889, leaf 70
ng on the square blade.The triangle may be turned over, set to point p andline q drawn, and by turning the triangle again the LIAES AND CURVES. 5q line s may be drawn from point r; finally the trianglemay be again turned over and line u drawn, whichrenders the drawing of the circle m unnecessary.… … in each half 01 the square, the diagonals E F, G H.From P as a centre with the radius P R draw thearc S E R. With the same radius draw from O asa centre the arc T D V. With radius L C drawarc R C V, and from K as a centre draw arc S B T. A very near approach to the true form of a trueellipse may be…

Mechanical drawing

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