Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 27
which the two kinds of trees grow. The exogenous trees, to which class belong the broad-leavedtrees and the conifers, increase from year to year both in heightand in size of trunk. The increase in height and in the length oftin- branches is the result of a sort of extension process which takesplace… … Fig. 1. Log Section of ConiferShowing Age Rings 14 CARPENTRY 5 soft and with a covering of thin skin. In the course of time theskin gets harder and darker in color and the woody tissue insidegets firmer, while the extension process continues to take place atthe end. Thus the branch or trunk of the…
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
