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 31
it meets XY, from which point in XY the balance of the shadow can bedrawn to a . EXERCISE IX I. Find the shadows on the planes of projection for the lines at .4, B, C, D and E. Thedirections for the rays are indicated by the arrow lines, the number of degrees near the arrowline showing at what… … 2. Make another set of lines arranged in various attitudes somewhat similar to those heregiven, and find the shadows cast when the parallel rays of light are directed towards the planesof projection, their elevations making 45° with XY and their plans 30^. SHADOWS OF PLANE FIGURES Section 8. The…
Geometry, Descriptive
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher05nati-208-138.webp)
