It is the misfortune of many good ideas to be so ridden as get run into the ground, and this is the way with the Phylloxera. This pest is bad enough in all conscience. It injures roots to such an extent, that, once effected, the plant is liable to mildews and many other diseases. But now come people who forget that there are many other enfeebling causes; and moreover, mildews and moulds do not always wait for weak plants, before beginning their destructive work. Mr. W. Saunders records an experiment where he took a branch of a grape vine out of a vinery, part in the house, and part in the open air, and, while the plant inside kept heallthy, the exposed branch was mildewed, and this accords with the experience of the best gardeners. Phylloxera does a good deal, but far from all of our grape 'mischief.