And what sort of work, it may be asked, can this volatile fellow perform? We cannot tell all -- the list is too long. Let us consider a few of them. If we fabricate tea-pots, sugar-basins, spoons, or anything else of base metal, he can and will, at our bidding, cover the same with silver or yellow gold. If we grow dissatisfied with our candles and gas, he will, on being summoned and properly directed by the master minds to whom he owns allegiance, kindle our lamps and fill our streets and mansions with a blaze of noonday splendor. If we grow weary of steam, and give him orders, he will drive our tram-cars and locomotives with railway speed, minus railway smoke and fuss.