The essentials of descriptive geometry . Fig. 43. 48 ESSENTIALS OF DESCRIPTIVE GEOMETRY of the revolved position of N. BN may now be revolved to thefirst position bn, and n will be shown at n. The elevation ofthe hopper may now be drawn as shown by the figure. 39. Special Cases, i. To find the length of a hne which liesin the first and third 2. To find the length of a Hne which Has in the profile plane. 40. Proposition 2. Given two views of a Hne to find where itpierces the planes of projection. Discussion. The point where the line pierces H must He onthe line itself and in the H p
The essentials of descriptive geometry . Fig. 43. 48 ESSENTIALS OF DESCRIPTIVE GEOMETRY of the revolved position of N. BN may now be revolved to thefirst position bn, and n will be shown at n. The elevation ofthe hopper may now be drawn as shown by the figure. 39. Special Cases, i. To find the length of a hne which liesin the first and third 2. To find the length of a Hne which Has in the profile plane. 40. Proposition 2. Given two views of a Hne to find where itpierces the planes of projection. Discussion. The point where the line pierces H must He onthe line itself and in the H plane. Therefore, the projections ofthe required piercing point will He on the projections of the given PROBLEMS ON THE LINE 49 Kne, and the elevation will lie on the G. L. If the elevation ofthe line be extended to meet the G. L. this point will be the ele-vation of the required piercing point; its plan view will lie on the
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Keywords: ., bookcentury1900, bookdecade1910, bookidcu3192400462, bookyear1915
