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 395
dingto Art. 337, be equal to the triangle B. 352 GEOMETRY. 340 Proposition.—Let JKLM {Fig. 256) be a given parallelogram, and K L^ diagonal. At any distance betweenyATand LM draw NP parallel to JK\ through the pointG, the intersection of the lines KL and NP, draw HIparallel to K M. In every… … this being the case, take D and F from the triangle KLM,and C diud E from the triangle jf KL, and what remains inone must be equal to what remains in the other; therefore,the parallelogram A is equal to the parallelogram B. 34(,—Proposition.—Parallelograms standing upon thesame base and between the…
Carpentry · Architecture · Building
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