As to the _time_ of application, while I judge any season will do, my present impression is that it will do most good if applied when the Summer is hottest and the ground driest. If, for instance, you close your haying in mid-Summer, having been hurried by the rapid ripening of the grass, and find your meadows baked and cracked by the intense heat, I reckon that you may proceed to dust those meadows with Gypsum with a moral certainty that none of it will be wasted. So if your Corn and other Fall crops are suffering from and likely to be stunted by drouth, I advise the application of Gypsum broadcast, as evenly as may be and as bounteously as its price and your means will allow. I do not believe it so well to apply it specially to the growing stalks, a spoon-full or so per hill; and I doubt that it is ever judicious to plant it _in_ the hill with the seed. The readiest and quickest mode of application is also, I believe, the best. _How_ Gypsum impels and invigorates vegetable growth, I do not pretend to know; but that it _does_ so was demonstrated by Nature long before Man took the hint that she freely gave. The city of Paris and a considerable adjacent district rest on a bed of Gypsum, ranging from five to twenty feet below the surface, and considerably decomposed in its upper portion by the action of water. This region produces Wheat most luxuriantly, and I presume has done so from time immemorial. At length it crawled through the hair of the tillers of this soil that the substance which did so much good fortuitously, and (as it were) because it could not do otherwise, might do still more if applied to the soil, with deliberate intent to test its value as a fertilizer. The result we all understand.