Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 57
,{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 d 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… … 115.— The axis being given, to find the foci, and to describe an ellipsis with a string. Let a b, {Fig. 80,) and c d, be the given axes. Upon c, with a e or 6 e for radius, describe the arc, ff; then/and/, the jooints at which the arc cuts the transverse axis, will be the foci. At/ and /place two…
Carpentry · Architecture
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