Johnston, Philip Devereux, 1855- · New York, D. Williams Company · leaf 46
/ \ i ^/^V X 1 l/f - ^^ \l 1 *3\ ^/ X 1 \ ~ X i___ \sZ_ _1 1 i^\ ■> \ 2 3 1 1 1 1 … 41 42 A MANUAL OF MECHANICAL DRAWING. into view another square on which would be markedthe Hues defining the depression, while its depth wouldbe laid off on the elevations and plans, as shown bydotted lines. The depression could also be shown bydotted lines on front elevation, the fact of the…
Mechanical drawing
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