Building construction and superintendence, by F.E. Kidder ... (1896)
Kidder, Frank E. (Frank Eugene), 1859-1905 · New York, W.T. Comstock · leaf 15
that a sharply-defined line occursonly where the spring wood abuts against the summer wood of itsinner neighbor. It is this clearly-defined line which enables the eyeto distinguish even the very narrow rings in old pines and spruces. In a pine board, sawed from near the centre of the log, the… … Fig- 3—Board of Tine. CS, cross section; RS, radial sec-tion; TS, tangential section; rw, summer wood; s/>w,spring wood. BUILDING AND FINISHING WOODS. 13 uniform thickness, the spring and summer wood would appear onthe face of the board as parallel bands, but, owing to the irregularityof the…
Building
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