"Oh!" said Michel. "Do speak plainly, you man of algebra!"
"Very well;" replied Barbicane, "in popular language the mean distance from the moon to the earth being sixty terrestrial radii, the length of the cone of the shadow, on account of the refraction, is reduced to less than forty-two radii. The result is that when there are eclipses, the moon finds itself beyond the cone of pure shadow, and that the sun sends her its rays, not only from its edges, but also from its centre."
"Then," said Michel, in a merry tone, "why are there eclipses, when there ought not to be any?"
"Simply because the solar rays are weakened by this refraction, and the atmosphere through which they pass extinguishes the greater part of them!"
"That reason satisfies me," replied Michel. "Besides we shall see when we get there. Now, tell me, Barbicane, do you believe that the moon is an old comet?"
"There's an idea!"
"Yes," replied Michel, with an amiable swagger, "I have a few ideas of that sort."
"But that idea does not spring from Michel," answered Nicholl.
"Well, then, I am a plagiarist."
"No doubt about it. According to the ancients, the Arcadians pretend that their ancestors inhabited the earth before the moon became her satellite. Starting from this fact, some scientific men have seen in the moon a comet whose orbit will one day bring it so near to the earth that it will be held there by its attraction."