Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 444
ce hi, and draw a line from a parallelto it. Draw Z perpendicular to these two lines, and index it tocorrespond with the points n and a. This is the scale of slopeof the plane required. Problem 185. Let tioo given lines ah and cd, inclined to each other and not inthe same plane, represent the axes… … 225. ah and cd in Prob. 179. We know that the point of contactmust be on a line perpendicular to both axes: the line nm(Prob. 179) fulfils these conditions. 424 SOLID GEOMETRY chap. The lines ah, cd, and 7ivi, Fig, 225, are precisely similar tothe corresponding lines of Eig. 192, and are indexed…
Geometrical drawing
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