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 137
two; and (as in Fig. 267) in a regular hexagon with inscribed triangles (one dotted), when it isprojected ujjon a plane parallel to a face. The dodecahedron projects as in Fig. 268 whenever the plane of projectioii is j^arallel to a face. 156 THEORETICAL AND PRACTICAL GRAPHICS. IFigr- STO. … Fig. 260 represents the icosahedron i^rojected on a jjlane parallel to a face, and Fig. 269 when the projection-plane is perpendicular to an axis. 420. The Devdopahle Hclicoid. When the word heUcoid is used without qualification it is under-stood to indicate one of the ivarped helicoids, such as is…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
