Page:Timber and Timber Trees, Native and Foreign.djvu/141

XX.] test the deflections of Teak under given weights at various distances, viz.:—

This piece, tried the other way, viz.:—

The specific gravity of these pieces was respectively .586 and .631.; a proof that they were thoroughly seasoned. Upon the laws which govern these deflections, I offer no opinion, and the experiments are merely introduced here to show how near the results go to confirm Professor Barlow's theory that the strength varies as the cubes of the length.

There is one other species of trial which it may be well to mention, namely, that to ascertain the elongation