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 59
Fig. 79,) parallel to a c, be the direction of the cutting plane.From m, draw m d, at right angles to a b ; then I m will be theaxis and height, and m 6^ an ordinate and half the base; as atFig. 92, 93. 114.— To find the height^ base and transverse axis of anhyperbola. Let o r, {Fig. 79,) be the… … Fig. 80. 115.— The axes being given, to find the foci, and to describe an ellipsis ivith a string. Let a b, {Fig. 80,) and c d, be the given axes. Upon c, with a e ovb e for radius, describe the arc, ff; then/and/, the points at which the arc cuts the transverse axis, will be the foci. At/ and…
Carpentry · Architecture
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