The American house carpenter. A treatise on the art of building. Comprising styles of architecture, strength of materials, and the theory and practice of the construction of floors, framed girders, roof trusses, rolled-iron beams, tubular-iron girders, cast-iron girders, stairs, doors, windows, mouldings, and cornices; together with a compend of mathematics. A manual for the practical use of architects, carpenters, stair-builders, and others (1880)
Hatfield, R. G. (Robert Griffith), 1815-1879, Hatfield, O. P., ed · New York, J. Wiley & sons · leaf 556
t if the angle be larger than one right angle, yet lessan two right angles, as BAH, extend HA to Aand FBK, and from //draw H J perpendicular to A J. TRIGONOMETRICAL TABLES. 513 Then, for the angle BAH, when the radius A H equalsunity, H y IS the smc ; A J the cosine ; BJ the versed sine ;B K \\\Q… … flG. 315. sines, etc. Or, the logarithms of the sines, cosines, etc., maybe found in logarithmic tables. In the absence of such a table, and when the degreescontained in the given angle are unknown, the values ofthe sine, cosine, etc., may be found by computation, as fol-lows:—Let ABC {Fig. 316) be…
Carpentry · Architecture · Building
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