J. H. McH., Pikesville, Md., writes: "I forward some branches cut from diseased trees, and shall he glad to have your advice as to the proper remedial treatment of the trees.

"The knots on the English oak appear principally on the lower branches on the north and west sides of the tree. The branches of the maple seem to have been killed after the blossoms were thrown out, and several maples of this variety are looking badly. The trees have been set out about twenty years, and have until within a year or two looked healthy and thriving." [The burr on the oak may be of fungoid origin, once formed the burr continues to increase in size every year, often attaining considerable size. It was not clear what was the matter with the maple branches. - Ed. G. M.]