Mechanical drawing for plumbers; a concise, comprehensive and practical treatise on the subject of mechanical drawing (1910)
Starbuck, R. M. (Robert Macy), 1844-1927 · New York, The Norman W. Henley publishing co. · leaf 56
W Pre*. 58. MECHANICAL DRAWING FOR PLUMBERS 53 … method followed in Nos. 3 and 4. Compar-ing Nos. 1 and 3, it will be seen that linesshaded in the one are light in the other,also in the case of Nos. 3 and 4. In No. 1 of Fig. 59, the same difficulties or ap-parent contradictions arise that we havealready mentioned. In such a case asthis, in order…
Plumbing · Mechanical drawing
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