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 89
ed. 230. In Fig. 131 the upper boundary, adhh, of a rectangle is divided at o, 6, c, etc., intoequal spaces, and through each point of division two lines are drawn with the 30° triangle, as 6 a;and hr through h. The oblique lines terminate on the sides and lower line of the rectangle. Ifthe work is… … The figure shows three of the possible designs whose construction is based on the dotted linesof the figure. For that at the top and right, in ^^hich horizontal rows of rhombi are left white, wedraw -^-ertical lines as s q and m n from the lower vertex of each intended white rhombus, continuingit…
Mechanical drawing · Lettering
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