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 129
Fig. 131. ters of the required ellipse. To describe the curve by intersec-tion of lines, proceed as directed at Art. 118 and note ; by atrammel, see Art. 125 ; and to find the foci, in order to describe itwith a string, see Art. 115.
Carpentry · Architecture
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