It has been seen that the influence which the atmoe-ipberio forces exert upon the soil is various and extensive. Their action, indeed, is not rapid nor energetic, and a very perfect exposure of the soil is necessary to catch much of the ameliorating influence. It is not, therefore, to be expected that a barren soil can be rendered fertile by mere exposure to the air, although it were wrought with a perfection that would have satisfied even Jethro Tull. The importance, however, of taking advantage of the manifold benefits to be derived from the air, it is hoped, has been rendered evident in the course of this paper. It needs scarcely perhaps be said that stagnant water will completely prevent any benefit that is to be looked for from this source, and that in the case of wet land its drainage must first of all be thoroughly effected. The ground being dry, and the rain consequently enabled slowly to filter through the soil, the full benefit of the atmospheric waters will be obtained. Unless in the case of sloping grounds, little rain water should run off the fields; almost the whole ought to sink gradually through the soil as it falls.

In order, however, to gain the utmost advantage from the frosts and atmospheric influences, as great a surface should be exposed to the air as possible; and the best way to effect this would seem, in the case of ground under tillage, to bet to have the soil plowed up into ridges like potato drills, and to leave it in this shape through the winter - a practice of which the advantage is well known to gardeners. Sir Joseph Paxton, for instance, advises that " the surface of all strong land should be laid up in ridges during the winter, as the action of frost, by expanding the moisture in it, leaves it when thawed in a fine pulverized, friable, or loosened state, by which it is rendered fertile, and ready immediately after levelling in favorable weather to receive the intended crop." Many other benefits, how. ever, than those of the frost, will result Are the oxygen, ammonia, carbonic acid, nothing Let the agricultural mind, therefore, be of good cheer; the atmosphere is a force everywhere present; although his farm may be like Justice Shallow's, " barren, barren," he has at least this consolation - "Marry, good air' - T. F. Jamieson of Ellon, in the English Agricultural Society's Journal.