Practical engineering drawing and third angle projection, for students in scientific, technical and manual training schools and for ... draughtsmen .. (1897)
Willson, Frederick Newton, 1855-1939 · Princeton, N.J., The author · leaf 74
branch.If a = c the curve has a point or cusp at the pole. When a> c the curve has an undulation orwave-form towards the jDole. * A series of curves much more closely resembling those of a shell can be obtained by tracing the paths of points on thepiston-rod of an oscillating cylinder. See Arts.… … 194. Mention has ah-eady been made of the fact that this was one of the curves invented forthe purpose of solving the problem of the trisection of an angle. ^^ere the angle m 0 x (or ^) wewould first draw p qr, the superior branch of a conchoid having the constant, c, equal to twiceDm. A parallel…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-36-4.webp)
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