It is wondrous strange that the savans of Europe have Just made this discovery, when it has been published in this country over twenty years. I believe, first in the American Flower Garden Directory, in 1832, and known now by every American garden laborer, though our vines are occasionally touched by the method of its application. Allow me to give you two. First. Our sulphur water-tub is always filled, and ready on call. We take a piece of stone lime (about four inches square); place it in a tub; put over it four gallons of boiling water; cover it over with a thick cloth; allow it to boil a few minutes; then stir the lime and sulphur freely, to a paste, and add about twenty gallons of cold water, allowing the whole to settle. When settled, we take the pure amber-colored water, and syringe any article that has symptoms of mildew. Patrick had charge of two of our houses. I directed him to syringe certain plants with sulphur-water. He kindly stirred up the whole, and gave them a good coat of lime and sulphur! Such a sight! "Why, Patrick, where did you learn that method?" "Indeed, sir, that's the way we do in London." Another way they do in London, is to dust sulphur all over the plant and fruit.

This is filthy in the extreme.

Now for the American way: Take a few pounds of snlphur, and place it on several pieces of boards, as neatly as you please; keep them in your grapery, stirring the sulphur once a week, and you will have no mildew, unless you give heavy waterings, and allow cold currents of air. Yours, &o., Robert Buist.