S. 2b construct tioo Horizontal Planes, three Ver-tical Planes, and two Inclined Planes, parallelto each other, and making Angles of 26 deg.30 min. with the Horizon. Draw a b c yy,fig. 7, as before, making ei per-pendicular to A B, and equal 6 feet, and e h equal3 feet; draw e/parallel to A d or B… … angle oeA equal mi, or, which is the same ineffect, draw o e parallel to i m ; also draw f nparallel to oe, join o n : here e o is equal m i: joinn D and o A; ahd all the proposed planes are con-structed. The constructions and intersection of planes arefound essentially useful in the study of…
Design · Decoration and ornament · Art
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