Dear Sir - I agree with you fully in your preference of blue grass and white clover for a lawn; they undoubtedly make the finest and softest turf of any of the grasses grown

50 bushels per acre, once in three to five years, till 300 bushels per acre is thoroughly well incorporated in the soil. In addition to the lime, it would be well to sow two bushels of plaster of Paris on each acre early every spring. Plaster is the direct food of the clover family, and is beneficial also to blue grass.

Another grass is getting to be in great repute in this vicinity for lawns, and this is the English perennial ray grass - not rye grass - that is quite an inferior kind of grass, and it is not perennial.

After preparing the lawn as recommended by you, sow at the rate of three bushels per acre; mix no other seed whatever with it, otherwise it will be likely to come up in tufts. August and March are the best months in this climate to sow ray grass. It has been cultivated for several years as far north as Connecticut, and south as far as the lower part of North Carolina; and when properly sown and cared for, it has given entire satisfaction, even as a field crop. It is in high repute for grazing, and yields almost as great an annual burthen as orchard grass. It has rather a coarse stalk and is of a rank growth; but when this comes to be cut often and close, in the manner of lawns, the grass grows finer and very thick; and forms the most elastic and velvety turf I have ever trod in the United States. It is about ten years since ray grass was first introduced into this neighborhood.

One more word about the treatment of lawns in our hot climate, and I have done. It is best to mow them in the afternoon, and just before a shower if possible, [but a lawn cannot be closely mown except when there is some moisture on the grass. Ed.] Irrigate, if you have water, for several evenings after mowing, if the weather be dry. If you cannot irrigate, then scratch the whole surface with a fine tooth harrow, or iron rake, spread a light dressing of swamp muck or compost upon it, and always roll hard with an iron roller the morning after mowing. A. B. Allen.

New-York, April 9,1851.