Those who wish to add to their sources of recreation and amusement may keep land tortoises, much in the same manner as we have proposed to keep rabbits, but with a smaller exercising-ground, and they may feed them with corn, meal, and succulent vegetables, and use them as food; or they may keep them in the open garden, being fed with lettuces, cabbages, etc, and allowed to burrow in the soil during winter. Tortoises, however, cannot be kept, except in mild situations, not much above the level of the sea, for they are very impatient of cold. The tree frog, which feeds on flies, might be kept in cages, or at liberty, in green-houses and vineries; either merely as an ornament, or to destroy the flies and other insects i and the large green frog migbt be kept in ponds, and led for culinary purposes, as it is in France, Germany, and Italy. The edible snail (Helix pomatia L.) might be kept, as it is near Vienna, in large pits covered with boards, and fed with cabbage leaves and other vegetables. The river crawfish (A'stacus fluviatilis) is not very common in Britain, but it abounds in some parts of the Continent, particularly in the marshy meadows of the Vistula, near Warsaw. These fish are reckoned a great delicacy on the Continent, either boiled and eaten cold like shrimps, or put into soup.

In England they are found in meadows on the margins of the Trent; and it might amuse a curious suburban resident desirous of making experiments, to try to subject them to cultivation. The medicinal leech, which lives chiefly on the spawn of fish or of frogs, might easily be kept in small ponds, provided care were taken to prevent it from getting to the fishponds; during summer, the leeches come out on the grass in search of smails and other food during night, and during winter they go into deep water. The silkworm, wherever there is a white mulberry tree, or abundance of lettuces, maybe reared, and silk produced as an amusement. The eggs, which may be procured in Covent Garden market in May and June, require to be hatched in a temperature of from 60° to 80°, on dry shelves, kept dean and well ventilated, and the worms require to be carefully tended and well fed. The silk, however, produced in England, is of no value but as a curiosity, from its want of tenacity; the thread only acquiring the necessary toughness to enable it to be reeled and spun with a view to profit, in a hot and dry climate.