Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 939
nk only in each tree can be exactly diametrical, the others are parallel therewith, and, asshown in Fig. 3937, the two sides of all the boards, but that from the centre are differently circum-stanced as regards the arrangement of the fibres, and contract differently. It will be generally foundthat… … Fig. 3941, which shows that the longest continuous line of fibres is concentric with the axis of the tree.Thus let a, !>, c, J, e,f represent the section of a board, the line b e of which is supposed to contain fivefibres, and the arc dbf thirty: therefore, supposing every fibre to shrink alike…
Mechanical engineering
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