One of the four cows originally imported into this country by John P. Cushing, Esq., of Massachusetts, gave in one year 3864 quarts, beer measure, or about 966 gallons, at ten pounds to the gallon, being an average of over ten and a half beer quarts a day for the whole year. It is asserted, on good authority, that the first Ayrshire cow imported by the Massachusetts Society for the Promotion of Agriculture, in 1837, yielded sixteen pounds of butter a week, for several weeks in succession, on grass feed only. These yields are not so large as those stated by Aiton; but it should, perhaps, be recollected that our climate is less favorable to the production of milk than that of England and Scotland, and that no cow imported after arriving at maturity could be expected to yield as much, under the same circumstances, as one bred on the spot where the trial is made, and perfectly acclimated. In a series of experiments on the Earl of Chesterfield’s dairy farm, at Bradley Ball, interesting as giving positive data on which to form a judgment as to the yield, it was found that, in the height of the season, the Holderness cows gave 7 gallons 1 quart per diem; the long-horns and Alderneys, 4 gallons 3 quarts; the Devons, 4 gallons 1 quart; and that, when made into butter the above quantities gave, respectively, 38¹⁄₂ ounces, 28 ounces, and 25 ounces. The Ayrshire, a cow far smaller than the Holderness, at 5 gallons of milk and 34 ounces of butter per day, gives a fair average as to yield of milk, and an enormous production of butter, giving within 4¹⁄₂ ounces as much from her 5 gallons as the Holderness from her 7 gallons 1 quart; her rate being nearly 7 ounces to the gallon, while that of the Holderness is considerably under 6 ounces.