Industrial drawing and geometry; an introduction to various branches of technical drawing (1911)
Spooner, Henry John, 1856- · London, New York [etc.] Longmans, Green, and co. · leaf 48
__A/_C 30 Pig. 84.—Fourth proportional to three given lines. ^ Fig. 85.—Findirig the height of a tower. 63. The Shadow cast on the Groimd by a Vertical Rod 6 high is 7 6 in length. Find the Height of a Tower whose Shadowis 30 long. Scale ^^ = 1 foot.—Obviously, the required jieight can be found by…
Mechanical drawing · Geometrical drawing
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