large tin sponging-bath is itself not sufficiently portable to be carried as railway luggage, but there are many substitutes. India-rubber has been for some time pressed into this service, either in the shape of a mere sheet to be laid on the floor, with a margin slightly raised to retain the water, or in a more expensive form, in which the bottom consists of a single sheet of the material, while the side is double, and can be inflated so as to become erect, in the same manner as the india-rubber air-cushions. Either form may be rolled up in a small compass. The latter give a tolerably deep bath, capable of holding two or three pails of water; but it is not very manageable when it has much water in it, and must be unpopular with the housemaids. As there is no stiff part about it, it is difficult, or rather impossible, for one person to lift it for the purpose of emptying the water; and the air must be driven out before it can be packed up again, which occasions a delay which is inconvenient in rapid traveling. Besides, on the Continent at least, where the essential element of water is not to be had, except in small quantity, the excellence of holding much is thrown away. Traveling-boxes have lately been made of that universal substance, gutta-percha, which serve the double duty of holding clothes or books on the roads, and of baths in the bed room. The top can be slipped off in a moment, and is at once available as a bath; and when ever the whole box is unpacked, both portions can be so employed. But the one disadvantage which prevents gutta-percha from being adopted for many other purposes tells against it here. It becomes soft and pliable at a very low temperature, which unfits it for hot climates, and for containing hot water in our own temperate regions. There is also the danger of burning or becoming injured by the heat, if left incautiously too near the fire. But for this drawback, it seems as if there was nothing to prevent every thing from being made of gutta-percha. It is almost indestructible, resists almost all chemical agents, and is easily moulded into any required form. But like glass, it has its one fault. Glass is brittle--gutta-percha can not resist moderate heat; and but for this, these two materials might divide the world between them. It is related that a certain inventor appeared before the Emperor Tiberius with a crystal vessel, which he dashed on the pavement, and picked up unhurt; in fact, he had discovered malleable glass, the philosopher's stone of the useful arts. His ingenuity did not meet with the success it deserved; for the emperor, whether alarmed at the novelty, and wishing to protect the interests of the established glass-trade or wishing to possess the wonderful vase, and to transmit it in the imperial treasure-chambers as an unique specimen of the manufacture, immediately ordered his head to be cut off, and the secret perished with him. Any one who rediscovered it, or could communicate to the rival vegetable