All I can add to this is that there is an English Walnut Tree, Alpine variety, on the farm of Mr. Deknatel, on Route 202, Chalfont, Penna., which is remarkable for its virility and crops of large nuts. This tree grows in a place protected by house and barn near a well, in limestone soil. It resisted the severe winters of 1935 and 1936, when many other English Walnuts in the vicinity died. My opinion is that any tree in that location would be an outstanding tree; and vice versa, had that particular tree been planted in another location, it would have done no better than any trees there located. Nuts from that tree might well be tested and compared with nuts from other trees. 2) The Banana Blight The banana blight in Central America threatened for a while to be as destructive as the chestnut blight in this country. It was due admittedly to an attack by soil fungi, but no fungicide to foliage or to the soil served its purpose. However, the proper restoration of bacterial life in soils to keep the soil fungi in check proved effective. This was a matter not of the presence or absence of any one inorganic nutrient, but of restoring to soils the balance of fertility, an abundance of organic matter as food for bacteriae. Dr. George D. Scarseth, West Lafayette, Ind.[4], is one of those largely responsible for correcting this epidemic. His experience may prove useful to nut growers, so that they may not live in constant fear of another blight epidemic such as the one that exterminated our chestnuts only a generation ago. 3) Tree Nutrition, Microbial From England comes interesting information about "Tree Nutrition"[5]. Evidence shows that the healthy growth of trees such as pines and spruces is intimately bound up with an association between their roots and fungi present in woodland soil. Poverty in mineral nutrients is no longer regarded as a necessarily critical factor in the failure of growth of trees of this kind, since the associated fungi have at their disposal sources of supply inaccessible to the roots of higher plants.