send me, and having tried all hold fast that which is good. Mr. Randolph is peculiarly happy in having the barleys committed to him, as he had been desirous of going considerably into that culture. I was able at the same time to put into his hands Siberian barley, sent me from France. I look forward with considerable anxiety to the success of the winter vetch, for it gives us a good winter crop, and helps the succeeding summer one. It is something like doubling the produce of the field. I know it does well in Italy, and therefore have the more hope here. My experience leaves me no fear as to the success of clover. I have never seen finer than in some of my fields which have never been manured. My rotation is triennial; to wit, one year of wheat and two of clover in the stronger fields, or two of peas in the weaker, with a crop of Indian corn and potatoes between every other rotation, that is to say once in seven years. Under this easy course of culture, aided with some manure, I hope my fields will recover their pristine fertility, which had in some of them been completely exhausted by perpetual crops of Indian corn and wheat alternately. The atmosphere is certainly the great workshop of nature for elaborating the fertilizing principles and insinuating them into the soil. It has been relied on as the sole means of regenerating our soil by most of the land-holders in the canton I inhabit, and where rest has been resorted to before a total exhaustion, the soil has never failed to recover. If, indeed, it be so run down as to be incapable of throwing weeds or herbage of any kind, to shade the soil from the sun, it either goes off in gullies, and is entirely lost, or remains exhausted till a growth springs up of such trees as will rise in the poorest soils. Under the shade of these and the cover soon formed of their deciduous leaves, and a commencing herbage, such fields sometimes recover in a long course of years; but this is too long to be taken into a course of husbandry. Not so however is the term within which the atmosphere alone will reintegrate a soil rested in due season. A year of wheat will be balanced by one, two, or three years of rest and atmospheric influence, according to the quality of the soil. It has been said that no rotation of crops will keep the earth in the same degree of fertility without the aid of manure. But it is well known here that a space of rest greater or less in spontaneous herbage, will restore the exhaustion of a single crop. This then is a rotation; and as it is not to be believed that spontaneous herbage is the only or best covering during rest, so may we expect that a substitute for it may be found which will yield profitable crops. Such perhaps are clover, peas, vetches, &c. A rotation then may be found, which by giving time for the slow influence of the atmosphere, will keep the soil in a constant and equal state of fertility. But the advantage of manuring, is that it will do more in one