Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 229
the corner, as- shown at (a). 210 DESCRIPTIVE GEOMETRY [IX, § 183 183. A Pipe Shaft (§§ 27, 31 to 36, 46, 53). Figure 190shows a portion of the floor and walls of a building, and twopoints o and b, in isometric projection. The line ah is to be thecenter of a pipe shaft, 3 0 square. The problem is… … Fig. 190 lines which form the edgesof the shaft, then to find where eachof these lines pierces each face of the floor and walls, and finallyto connect these piercing points so as to show the requiredholes. In this problem it will be wise to establish no formal axis line,but to use the front and…
Geometry, Descriptive
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