. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 258 Bulletin 193. not show the pockets, since the soft wood is so readily fractured by the teeth of the saw. But when the end of a block is planed off smooth the pockets in transection are quite distinctly brought to view. They are shown in the photograph. From a side and end view shown in the photo- graphs the pockets are seen to be oblong in side view and cylindrical in cross section. Tliey are 2 to 3 nnn. broad and 4 to 6 mm. lono^. In the younger por
. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 258 Bulletin 193. not show the pockets, since the soft wood is so readily fractured by the teeth of the saw. But when the end of a block is planed off smooth the pockets in transection are quite distinctly brought to view. They are shown in the photograph. From a side and end view shown in the photo- graphs the pockets are seen to be oblong in side view and cylindrical in cross section. Tliey are 2 to 3 nnn. broad and 4 to 6 mm. lono^. In the younger portions of the trunk, some distance above the size where Jogs were cut, and below the point of entrance of the fungus, and thus nearer it, the pockets were not yet formed. This is probably due to the fact that while tlie mycelium first pene- trated the heart wood here, tlie latter being younger was more resistant, and the process of disintegration pro- ceeded less rapidly. The 23ockets aj^pearing on cer- tain of the branches is ac- counted for by the fact that these branches had been killed for some time, and were consequently in a less resistant condition. The formation of pockets by the rapid disintegration of the tissues at many cen- tres recalls the "peckiness" of cypress wood caused by the mycelium of a fungus yet unknown. The pockets in the cypress wood are much larger, however, and the structural character of the affected wood is quite different. In the case of the cypress trunks affected with this disease known as " peckiness," it is believed that tlie fungus, while developing at the centres, excretes an enzyme or " ferment," which permeates the sur- rounding wood and acts as an antiseptic which prevents the further. 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 Cornell
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