Educational woodworking for home and school (1908)
Park, Joseph C · New York, MacMillan · leaf 309
4 Inscribed. Diameter between angles qiven Fig. 258. —The octagon. 290 EDUCATIONAL WOODWORKING … 8^ Constant (equable) spiral. Variable(qeometric)spiral. Involute on a 3(]Udre. (spiral of A.rchlmcdes) ^Circle in centre i» the eye) AB AB.etC radium vector.Pitch-V- Fig. 259.— Curves and spirals.
Manual training · Woodwork
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