Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 185
tsman, for his designs, will probably have to confine himself to the timberwithin his reach. But he should know what is best for his purpose, reference being hadto economy in cost and maintenance. For most purposes, wood should be seasoned, sothat joints may not open under this operation after the… … MATERIALS. 169 air-currents; if in a kiln, it can be done speedily with heated air, or by steam. Forbeams, girders, and the like, there should be few knots, especially on the outer edges—for posts, small ones are not objectionable; while for sidings and under-floors, firm, largeknots do not impair…
Mechanical drawing
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