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 81
erpendiculars to the trace lines. Thenby parallels the three upper faces of the cube, all foreshortened in appearance,may be found. Three of the bars are by this time represented, each by three lines.By the careful use of parallels each of the remaining nine bars may be found. Allthe twelve bars… … Fig. 73. EXERCISE XXX
Geometry, Descriptive
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