Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 146
Fig. 28. Fig. 29. Fig. 30. 113 22 MECHANICAL DIJ AWING. ellii)se, parabola and hyperbola without piojectioiis; it will nowbo shown that they may be obtained as actual intersections. In Fig. 31 the plane cuts the cone obliquely. To iiiidpoints on the curve in i)lan take a series of horizontal pLines
Architecture · Building · Carpentry
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