W. A. M., Philadelphia, says: "Seeing in your February number, page 49, a wash for trees, I only wish to remind your patrons that the following wash (although not new) is the best we ever used. Perfectly harmless as to any injury to old or young trees; I speak particularly of fruit trees. It can be applied with a whitewash brush. If the trunks of the trees are moist, the wash will penetrate better and be more expeditiously done. Wash as high as can be reached above the trunks. The mixture consists of clay, cow manure well rotted, and lime, the latter in moderate quantities, made to the consistency of whitewash. The color depends upon the different ingredients, whether dark or light. I have been familiar with the use of it for forty years."