It is the usual, though a bad practice in this country, to let spring pigs run at large for the first 15 months, with such food as is convenient; and if fed at all, it is only to keep them in moderate growth till the second autumn. They are then put up to fatten, and in the course of 60 or 90 days are fed off and slaughtered. During this brief period, they gain from 50 to 100 per cent. more of dressed weight than in the 15 or 18 months preceding: nor even then do they yield a greater average weight than is often attained by choice, thrifty pigs, which have been well-fed from weaning to the age of 8 or 9 months. Three pigs of the Bedford breed, when precisely 7½ months old, dressed 230, 235, and 238½ lbs. Two of the Berkshire and Leicester breeds, at 9 months, dressed 304 and 310 lbs. Three others of the Berkshire and Grass breeds, 7 months and 27 days old weighed 240, 250, and 257 lbs. net. Innumerable instances could be adduced of similar weights, gained within the same time, with a good breed of animals under judicious treatment. We have no one accurate account of the food consumed, so as to determine the relative profit of short or long feeding. But that an animal must consume much more in 18 or 20 months to produce the same quantity of dressed meat, which is made by others of 8 or 9 months, does not admit of a doubt. We have seen that an ox requires but little more than double the quantity of food to fatten, that is necessary for supporting existence. If we apply this principle to swine, and state the quantity of food which will fatten the pig rapidly, to be three times as great as for the support of life, we shall find that the pig will fatten in 7 months, on the same food he would consume to keep him alive for 21. This is based on the supposition that both animals are of equal size. But the pig that matures and is slaughtered at 7 months, has only a moderate capacity for eating. During the early stages of his growth, his size and the consequent incapacity of the digestive organs, prevent the consumption of the same quantity which the larger animal requires; and his accumulating fat, his limited respiration, consequent upon the compression of his lungs, and his indisposition to exercise, all conspire to keep the consumption of food within the smallest possible limit. This result, in the absence of any experiment, must be conjectural entirely; but we believe that experiments will show, that of two thrifty pigs from the same litter, one of which is properly fed to his utmost capacity for 7 months, and the other fed with precisely double the quantity of similar food for 21 months, the first will yield more carcass and of a better and more profitable quality than the latter, which has consumed 100 per cent. the most.