The American house carpenter: a treatise upon architecture, cornices and mouldings, framing, doors, windows and stairs. Together with the most important principles of practical geometry (1852)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 31
its base, passing quite through the curved surface,(a 6, Fig. 23.) 59.—A parabola is described if a cone be cut by a plane,parallel to a plane touching the curved surface, (c rf, Fig. 23—c d being parallel to / g.) 60.—An hyperbola is described if a cone be cut by a plane,parallel to any plane… … 62.—The transverse axis is the longest diameter of theellipsis, [a b, Fig. 24.) 63.—The conjugate axis is the shortest diameter of theellipsis ; and is, therefore, at right angles to the transverse axis.(c d, Fig. 24.) 64.—The parameter is a right line passing through the focusof an ellipsis, at…
Carpentry · Architecture
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