Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 130
/60 140 Fig. 247. TOPOGRAPHICAL DRAWING. 113 gator, as by it he can lay off his course on a straight line. In this projectionthe surface of the sphere is developed on a tangent cylinder. Conceive theoutlines of the continents to be drawn on this, and afterward the surface to beunrolled and laid… … 60 120 Fig. 248. m 2i0 300 TO 70 360 is contained the axis of the sphere. Divide the quadrant P Q into 10° parts, aline drawn from C through these points, intersecting the tangent X Z, will bethe point for the parallel of that degree. Make the equator of the projection314 times the diameter of the…
Mechanical drawing
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