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 136
d : ed : cwhen V M\ _-_ A^ \ m / w \, ■,/\ J\ … OCTAHEDRON. DODECAHEDRON :: n/3 : ^/2; for the cube d : e :: >/3 : 1 :: •>/ 2 : 1; dodecahedron e = the greater segment of the edge the latter has been medially divided, that is, in extreme and mean ratio.For the icosahedron e = thechord of the arc whose tangent isd; i. e., the chord of 63°…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
