Scions from another fine tree of Polish origin growing at Mr. Crath's place in Toronto were set on several trees in this state in the spring of 1933 and in every case endured the lowest temperature without much injury to the new growth. A very unusual condition was noted, though on three young black walnut trees top-grafted to scions of this tree. On these trees the vigorous grafts appeared to be uninjured in the wood, but the bark at the point of union on both stock and scion was so severely injured that the grafts died. An examination showed evidences of bark splitting and this was undoubtedly caused by a severe and sudden cold spell following a very late and extremely vigorous growth. Scions of this strain were grafted on a medium sized black walnut at Caro, Michigan, and these endured -30 degrees F. without serious injury. A small black walnut tree at the Kellogg Farm top-grafted to scions of another Crath seedling showed bark injury on the lower half of the stock, but fortunately the extent of the injury was not great and the graft was saved. It also made a vigorous growth this season notwithstanding the hot dry weather and injury to the bark on the stock. Scions of this strain were grafted on a vigorous black walnut on the farm of F. Wilde at Wayland in 1933. These scions made an extraordinary growth that season and were subjected to a temperature of -20 degrees F. last winter. Some killing back occurred but no permanent injury was done as the grafts have made a good growth this season. _Pomeroy Seedlings_ This strain of walnuts originated on the farm of Mr. Norman Pomeroy of Lockport, New York. Trees from this plantation, or seedlings of these trees, are grown at various places throughout Michigan with the heaviest concentration near Lexington. There are also a number of Pomeroy seedlings on the farm of Mr. Grant Fox at Leamington, Ontario. All of the trees in the Lexington district were more or less severely injured by killing back of the branches and occasionally by bark splitting or bark killing. At St. Louis one very fine tree was nearly girdled by bark injury and will undoubtedly die. Near Ithaca another tree showed moderate killing back and in the city two trees were killed to the ground and one other so severely injured as to be useless. The trees at Leamington, Ontario, were also severely injured, especially those that bore thin-shelled nuts. Some of the larger trees in this plantation which bore nuts with moderate thick shells were not as severely injured, and this would seem to indicate that there may be a relationship between thickness of shell and resistance to winter cold.