Prof. Caldwell told the recent meeting of the Western New York Horticultural Society that it has been discovered that mildew can be prevented by soaking the stakes on which the vines twine in a solution of blue vitriol. These stakes were mixed with others not soaked, through the vineyard, and in every case where not soaked all the leaves were entirely ruined, while those on the soaked stakes were healthy. A weaker solution of the vitriol was not so effective. The effect of the soaking gradually dies out, but will last from four to six years.