Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction . lines parallel to the edges of the figure, makethe shadow of the square on the so far as itis cast upon that plane. Next find the of theray through B at b2 and finish the outhne of theshadow, which must, of course, run up to the pointwhere the figure touches the In Fig. 20 acircle, parallel to , casts most of its shadowon to the , found by obtaining //, the ofthe ray through the centre A, and using it as acentre for a circle, or rather, the segmen
Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction . lines parallel to the edges of the figure, makethe shadow of the square on the so far as itis cast upon that plane. Next find the of theray through B at b2 and finish the outhne of theshadow, which must, of course, run up to the pointwhere the figure touches the In Fig. 20 acircle, parallel to , casts most of its shadowon to the , found by obtaining //, the ofthe ray through the centre A, and using it as acentre for a circle, or rather, the segment of a circle,on the The rest of the shadow, namely, theshadow of the segment BCD, will be caught by the ^ ip, To obtain it, find for a number of rays passing through points on the curve BDC. Some such points are marked at i, 2,3 and 4 in the figure. A free-hand curve is drawn on the through the the rays passing into these points. In Fig. 21 the of the ray through the centre .1, falls beyond the VF,providing for only the smaller segment of a circle to be cast as shadow on the. 24 DESCRIPTIVE GEOMETRY Use this point H as centre, as before, and describe the circular part of theshadow appearing on the in front of the , and then proceed to find theshadow cast on the as in Fig. 20.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcetc, bookyear191
