"A splendid fellow," said my uncle; "only he little suspects the marvelous part he is about to play in the history of the world."
"You mean, then," I cried in amazement, "that he should accompany us?"
"To the interior of the earth, yes," replied my uncle. "Why not?"
There were yet forty-eight hours to elapse before we made our final start. To my great regret, our whole time was taken up in making preparations for our journey. All our industry and ability were devoted to packing every object in the most advantageous manner—the instruments on one side, the arms on the other, the tools here and the provisions there. There were, in fact, four distinct groups.
The instruments were of course of the best manufacture:
1. A centigrade thermometer of Eigel, counting up to 150 degrees, which to me did not appear half enough—or too much. Too hot by half, if the degree of heat was to ascend so high—in which case we should certainly be cooked—not enough, if we wanted to ascertain the exact temperature of springs or metal in a state of fusion.
2. A manometer worked by compressed air, an instrument used to ascertain the upper atmospheric pressure on the level of the ocean. Perhaps a common barometer would not have done as well, the atmospheric pressure being likely to increase in proportion as we descended below the surface of the earth.
3. A first-class chronometer made by Boissonnas, of Geneva, set at the meridian of Hamburg, from which Germans calculate, as the English do from Greenwich, and the French from Paris.
4. Two compasses, one for horizontal guidance, the other to ascertain the dip.
5. A night glass.