The doctor, who was an able chemist as well as an ingenious physiologist, knew how to obtain this gas in great quantity and of good quality, not by using manganate of soda, according to the method of M. Tessié du Motay, but by the direct decomposition of slightly acidulated water, by means of a battery made of new elements, invented by himself. Thus there were no costly materials, no platinum, no retorts, no combustibles, no delicate machinery to produce the two gases separately. An electric current was sent through large basins full of water, and the liquid was decomposed into its two constituent parts, oxygen and hydrogen. The oxygen passed off at one end; the hydrogen, of double the volume of its late associate, at the other. As a necessary precaution, they were collected in separate reservoirs, for their mixture would have produced a frightful explosion if it had become ignited. Thence the pipes were to convey them separately to the various burners, which would be so placed as to prevent all chance of explosion. Thus a remarkably brilliant flame would be obtained, whose light would rival the electric light, which, as everybody knows, is, according to Cassellmann’s experiments, equal to that of eleven hundred and seventy-one wax candles,—not one more, nor one less. It was certain that the town of Quiquendone would, by this liberal contrivance, gain a splendid lighting; but Doctor Ox and his assistant took little account of this, as will be seen in the sequel. The day after that on which Commissary Passauf had made his noisy entrance into the burgomaster’s parlour, Gédéon Ygène and Doctor Ox were talking in the laboratory which both occupied in common, on the ground-floor of the principal building of the gas-works. “Well, Ygène, well,” cried the doctor, rubbing his hands. “You saw, at my reception yesterday, the cool-bloodedness of these worthy Quiquendonians. For animation they are midway between sponges and coral! You saw them disputing and irritating each other by voice and gesture? They are already metamorphosed, morally and physically! And this is only the beginning. Wait till we treat them to a big dose!” “Indeed, master,” replied Ygène, scratching his sharp nose with the end of his forefinger, “the experiment begins well, and if I had not prudently closed the supply-tap, I know not what would have happened.” “You heard Schut, the advocate, and Custos, the doctor?” resumed Doctor Ox. “The phrase was by no means ill-natured in itself, but, in the mouth of a Quiquendonian, it is worth all the insults which the Homeric heroes hurled at each other before drawing their swords, Ah, these Flemings! You’ll see what we shall do some day!” “We shall make them ungrateful,” replied Ygène, in the tone of a man who esteems the human race at its just worth. “Bah!” said the doctor; “what matters it whether they think well or ill of us, so long as our experiment succeeds?”