Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction (1915)
Armstrong, Henry F. (Henry Fry), 1868- · New York, J. Wiley & sons, inc.; [etc., etc.] · leaf 30
in length to theline itself, and paraUel to it. Hence in cases shown at (ii) and (iii) in Fig. 16 20 SHADOWS OF LINES 21 this fact can be taken advantage of, and therefore the shadow of the point B havingbeen found, from it a parallel to the given line is drawn for so much of the shadowas falls… … In Fig. 16, (v), it will be seen to be necessary, where the line is an obHqueline, and part of its shadow is caught by the V.P., to first cast the shadow as if itfell completely on the H.P., part of it beyond the V.P., and then to join up fromthe point where it crosses AT to the shadow of its upper…
Geometry, Descriptive
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