In regard to fire blight, Dr. J. G. Hunt, in a communication to the Gardener's Monthly, some years ago, demonstrated to our entire satisfaction that it was caused by a small ferment fungus. Professor T. J. Burrill has recently confirmed this view. In like manner it has been clear to us that the fungus attacking the roots results in the yellow of the peach. Prof. Burrill now finds a similar ferment fungus in the diseased peach trees, which may well be an outgrowth from the larger form at the roots. We have felt that these causes could not be disputed, and have insisted on their presence as being quite satisfactory in accounting for the disease. But the confirmation by Prof. Burrill will be of great value.