Kenison, Ervin, Gardner, Harry W, Lawrence, William Henry, 1868-, Everett, Herbert E. (Herbert Edward), 1863-1932, Gregg, D. A. (David A.), Von Holst, H. V. (Hermann Valentin), 1874-1955, Brown, Frank Chouteau, 1876-1947, Griffin, Charles Lewis, 1867-, Neubecker, William, 1864-, Zapf, Alfred E, American School (Lansing, Ill.) · Chicago, Ill. : [American School of Correspondence] · leaf 197
oint <?, one end of the shade line; this point, lying in Y, is its own shadow on Y. (& 39). The line ef being perpendicular to Y, its shadow, or as much of its shadow as falls on Y, will be, therefore, a 45° line drawn from ey. The point th, in plan, shows the amount of the line ef which falls on… … on the front face of B, that is to say, the distance/V7. The shadow of the remainder, rvgv, falls beyond the prism on the Y plane, and is evidently the line rvs</vs. Thus the shadow of the shade line from e to g has been. determined. The next portion of the shade line, gc , is a vertical line and…
Mechanical drawing
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