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 117
to indicate an invisible limit or line of the object. The lino shading would usually be omitted, the shade linesgenerally sufficing to convey a clear idea of the fomi. 391. Half of a hollow, hexagonal prism. In a semi-circle ofdiameter ad step off the radius three times as a chord, givingthe… … ^ig-. 335.
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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