. Timber and some of its diseases. Timber; Trees. IX.] HEALING OF WOUNDS BY OCCLUSION. 217 provided the wound is not too large, and the tree is full of vigour, the margins of the callus will meet near the middle, and what was the exposed cut surface of the branch will be buried beneath layers of new. Fig. 31.—The same piece of stem six years later still : the surface of the cut branch has now been covered in for some time, and only a boss-like projection marks where the previous cut surface was. This projection is protected by cork layers, like ordinary outer cortex, the old outer cortex crack
. Timber and some of its diseases. Timber; Trees. IX.] HEALING OF WOUNDS BY OCCLUSION. 217 provided the wound is not too large, and the tree is full of vigour, the margins of the callus will meet near the middle, and what was the exposed cut surface of the branch will be buried beneath layers of new. Fig. 31.—The same piece of stem six years later still : the surface of the cut branch has now been covered in for some time, and only a boss-like projection marks where the previous cut surface was. This projection is protected by cork layers, like ordinary outer cortex, the old outer cortex cracking more and more as the stem expands. wood and cortex, between which lies the cambium now once more continuous over the whole trunk of the tree (Figs. 31 and 32). It is not here to the purpose to enter into the very. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ward, H. Marshall (Harry Marshall), 1854-1906. London, Macmillan
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