Of these about 300,000 were heifers that had not yet produced any milk. The actual milking class, therefore, comprised about 4,100,000 cows and heifers; of these, about 600,000 were heifers that calved in the winter and spring of 1909-10, and 300,000 were heifers that calved in the summer and autumn of 1910. The number of cows that produced two or more calves may be taken to be about 3,200,000; of these about 600,000 should have produced their second calf in the winter and spring 1909-10, and would be milked as heifers in the summer and autumn of 1910; the number of mature cows from which a full season's supply of milk was obtained during the twelve months from June 5, 1909, to June 4, 1910, was apparently about 2,600,000. A large quantity of milk is yielded during the year by cows sold or lost during the twelve months before the census. Possibly ten per cent. of the milk produced in the twelve months from June, 1909, to June, 1910, was yielded by cows that were sold or lost before the census of June, 1910. It is estimated that the 3,200,000 cows (including the 600,000 that up to the winter of 1909-10 were heifers) produced, on the average, 44 cwts. (480 gallons) of milk per head in the twelve months from June 5, 1909, to June 4, 1910; the 300,000 heifers that calved in the summer and autumn, 30 cwts. (330 gallons) per head; the 600,000 heifers that calved in the winter and spring of 1909-10, 15 cwts. (165 gallons), making the total quantity of milk produced in the twelve months by cows and heifers on the farms, and that produced calves during the twelve months (June, 1909-1910), 158,800,000 cwts. (1,746,800,000 gallons), or about 426 gallons per head, and about 400 gallons per head for all the cows and heifers in milk or in calf in 1910. There remains to add the milk yielded by the cows that were sold during the twelve months, and of cows and heifers in feeding pastures that were milked during the twelve months, June to June, 1909-10, and which probably formed one tenth of the whole supply, making the total supply for the twelve months 176,444,000 cwts., or 1,940,884,000 gallons. This equals 2 tons, or 440 gallons per head, crediting the whole supply to the 4,400,000 cows and heifers in milk or in calf in June, 1910. At 7-1/4d. per gallon the value of milk produced in the United Kingdom in the twelve months was £58,600,000. Including the value at birth of the calves, the total value of the produce of the milk-giving class would be about £62,000,000. The value of the milk, butter, cheese, and cream sold or consumed in farmhouses would be about £48,000,000, or equal to about 24 per cent. of the gross annual income of farmers.