A subscriber of Newport, R. I. says: "Will you oblige me by giving your opinion as to the best application (wash) for removing or preventing the growth of lichen on the bark of certain trees. I have heard recommended a solution of potash - common whitewash and kerosene oil. In this damp climate, the growth of many trees is much retarded (and in some cases young trees are killed) by this fungous (?) growth. The Elms and Pear trees suffer most, while the Horse Chestnut, the Sugar Maple and Birches seem to enjoy an immunity. An answer in the columns of your Monthly will greatly oblige".

[Trees which have smooth bark, or trees which have rough bark only after a number of years, are not very liable to be disfigured. The lichen grows only on decaying bark. If the tree grows so rapidly as to throw off the decaying bark lichens will not trouble them much; hence manure or rich soil is a great help to keep down this nuisance. Where the lichen has gained a foothold, such washes as suggested will be effective, and without injury to the tree. Indeed the trees will be benefitted by the application. - Ed. G. M].