Conseil and he came to me in my room. I inquired the cause of their visit.
"A simple question to ask you, sir," replied the Canadian.
"Speak, Ned."
"How many men are there on board the Nautilus, do you think?"
"I cannot tell, my friend."
"I should say that its working does not require a large crew."
"Certainly, under existing conditions, ten men, at the most, ought to be enough."
"Well, why should there be any more?"
"Why?" I replied, looking fixedly at Ned Land, whose meaning was easy to guess. "Because," I added, "if my surmises are correct, and if I have well understood the captain's existence, the Nautilus is not only a vessel, it is also a place of refuge for those who, like its commander, have broken every tie upon earth."
"Perhaps so," said Conseil; "but, in any case, the Nautilus can only contain a certain number of men. Could not you, sir, estimate their maximum?"
"How, Conseil?"
"By calculation; given the size of the vessel, which you know, sir, and consequently the quantity of air it contains, knowing also how much each man expends at a breath, and comparing these results with the fact that the Nautilus is obliged to go to the surface every twenty-four hours for a supply of air."
Conseil had not finished the sentence before I saw what he was driving at.
"I understand," said I; "but that calculation, though simple enough, can give but a very uncertain result."
"Never mind," said Ned Land urgently.
"Here it is, then," said I. "In one hour each man consumes the oxygen contained in twenty gallons of air; and in twenty-four, that contained in 480 gallons. We must, therefore, find how many times 480 gallons of air the Nautilus contains."
"Just so," said Conseil.
"Or," I continued, "the size of the Nautilus being 1,500 tons, and one ton holding 200 gallons, it contains 300,000
