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ar trunk to show curly grain is related to the fact that the top of the tree at Ithaca was of another variety than the original Lamb. Possibly the foliage of the original variety producing the curly character is necessary to produce the curly grain. An argument against this interpretation is that the tree at Beltsville, Maryland, is not topworked. It would be valuable at the present time to survey all the trees of the Lamb walnut, which are growing in various parts of the country, to see under what circumstances they may be showing the curly characteristic of the original tree. Dr. M. Y. Pillow of the Forest Products Laboratory at Madison, Wisconsin, in an unpublished report, has pointed out that it is possible to determine the curly nature of the grain by shaving off the outer bark, exposing the inner bark just outside of the cambium. Inasmuch as the same cambium cells form fiber cells both on the inside to make the wood and towards the outside to make the bark, the direction and nature of the fibers in the bark are a direct indication of the direction of the fibers underneath the cambium in the wood. The appearance of the normal straight grained wood and bark and wood and bark of a curly grained tree are shown in figures 4 and 5. Shaving off the outer bark in this manner will not harm the trees, if it is done carefully so it would be possible to make this survey without injury to the trees. Examining a number of trees of the Lamb walnut in this way and finding that some were curly, might give evidence as to the conditions under which the Lamb walnut will produce curly grain. Dr. Pillow of the Forest Products Laboratory, kindly furnished me with his file on curly and birdseye grained wood. In this file is a very interesting group of manuscripts and letters including a report from Mr. Willard G. Bixby reporting a trip to New Hampshire to study the occurrence of birdseye maple and also his early experiments with the Lamb walnut. The Lamb walnut trees at that time were too young to give any indication of curly grain. Other letters of interest on the subject were from Mr. J. F. Wilkinson, A. S. Colby and C. A. Reed. These letters mention the desirability of propagating figured walnut but aside from indicating that trees of the Lamb had been propagated there was no indication that curliness had developed. The first definite indication that curliness would develop in a grafted tree was reported by Mr. Wilkinson (Ref. 7)
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