Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 57
E is equally distant from the directrix and the focus,i.e. CE is = EB. Any line parallel to the axis is a diameter.A straight line drawn across the figure at right angles to the 42 MECHANICAL DRAWING. axis is a double ordinate, and either half of it is an ordinate.The distance from C to any point… … (6 kI 1 cS x t£ D A 6 0 4 0 \E B > n 1 3 2 4 Fig. 70. curve. Draw parallels to BD through any points in AB, andwith center C and radii equal to the horizontal distances ofthese parallels from BD describe arcs cutting in the points I,2, 3, 4, etc. These are points in the curve. The tangent tothe…
