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 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… … Three other cases are shown in Fig. 17, where the line is so arranged that itis neither parallel to one plane nor to the other. In all three cases the end Atouches the V.P. and therefore that part of the shadow which falls on the V.P. 22 DESCRIPTIVE GEOMETRY must start from a\ while in (i) and…
Geometry, Descriptive
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