I shall now add a few words on keeping _silk-worms_, and then I think I shall have said quite enough on the animals usually kept in the country. Silk-worms succeed best when fed on the leaves of the white mulberry, but those of the black mulberry are unwholesome for them. When the leaves of the white mulberry cannot be procured, lettuce leaves or those of the maclura are the best substitute. Where the mulberry is grown purposely for silk-worms, the trees are cut down to the ground every year to make them send up strong vigorous shoots. The leaves of these shoots are gathered in the morning after the dew has gone off, so that they may be perfectly dry, and, when stripped off, they are deposited in a bag kept open with a hoop round the top, in order that they may be preserved in as fresh a state as possible; and every leaf is taken off one tree before another is begun upon, as it is found that this plan of stripping the trees entirely injures them less than taking a few leaves from each at a time; as, after the tree has been for some time entirely denuded, it forms a fresh set of leaf buds, and produces a second crop of leaves. None of the leaves of this second crop, however, must be taken off. Where labour is sufficiently cheap, the leaves are best cut off with a pair of scissors. If you should feel inclined to try your skill in feeding silk-worms, you can purchase the eggs in Covent Garden market for ten shillings an ounce, and, if kept in a cool place, they will remain good for nearly a year. When they are to be hatched, they must be exposed to a temperature of 86° Fahr., and they are best kept in a room appropriated for the purpose, and heated by a stove. If you have any small room adjoining your laundry, or any other place where there is a constant fire, you will have no difficulty in managing your silk-worms. Supposing you to have a room of this nature, it will be well to have tables and shelves provided for keeping the insects on; the shelves should not be let into the wall, but should be so contrived, by being suspended on holdfasts or in some other way, as to have the air on every side; and they should be furnished with ledges round them to prevent the insects from falling off.