Higbee, F. G · New York, John Wiley & Sons · leaf 163
IS2 ESSENTIALS OF DESCRIPTIVE GEOMETRY sphere as shown in the figure by horizontal planes 1-2-3-4, etc.,and lay off the distances 1-2; 2-3; 3-4, etc., in the line 1-7, … thus making the line 1-7 equal to J the great circle of the sphere.Through the point i, 2, 3, 4, etc., thus located draw horizontallines; these will be the developed circles cut by the horizontal SURFACES OF REVOLUTION IS3 planes through i, 2, 3, 4, etc. On each of these horizontal lineslay off the…
Geometry, Descriptive
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