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 213
lim- inary step to be taken before finding its shadow. That is, to deter- mine the highest point in the shadow ays. We do this to know where it is useless to pass auxiliary planes through the scotia. Such planes would evidently be useless between the point ays and the shade line xyay//y in… … a line of intersection exactly like the profile aycy. If we revolve the plane P and its line of intersection about the axis oh until it is parallel to V, the line of intersection will then coincide with this profile aycy, the point ay having moved to the point a'y . If, before revolving, we had…
Mechanical drawing
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