The technic of mechanical drafting a practical guide to neat, correct, and legible drawing (1904)
Reinhardt, Chas. William (Charles William), b. 1858 · New York, The Engineering News Pub. Co. · leaf 31
the first boring,may be represented in such a case. The portion of covered filter bed section on plate V. shows suc-cessive layers of filter-ing materials; differentsizes of filter gravelmay be designated asshown; observe howthe light strip at thebase of the two upperlayers of that materialenhances… … Transverse Section L-L. Fig. 54, On the manhole-section introducedon the same plate every material shows so distinctively that thedescriptive matter was totally dispensed with on that drawing. Thesections of the vitrified pipe were here, for exceptional reasons, leftentirely white. As the drawings…
Mechanical drawing
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