The Professor nodded approvingly.
“You are right, Captain Whipper—”
“Wopper,” said the Captain, with a grave nod.
“Wopper,” repeated the Professor, “the glacier des Bossons, like all the other glaciers, seems to remain immovable, though in reality it flows—ever flows—downward; but its motion is so slow, that it is not perceptible to the naked eye. Similarly, the hour-hand of a watch is to appearance motionless. Do you want proof? Mark it just now; look again in quarter of an hour, and you see that it has moved. You are convinced. It is so with the glacier. Mark him to-day, go back to-morrow—the mark has changed. Some glaciers flow at the rate of two and three feet in the twenty-four hours.”
“Yes, but how do they flow, being so brittle?” demanded Mrs Stoutley.
“Ay, that’s the pint, Professor,” said the Captain, nodding, “how do they flow, bein’ made of hard and brittle ice?”
“Why, by rolling higgledy-piggledy over itself of course,” said Lewis, flippantly, as he came up and sat down on the end of the sofa, being out of humour with himself and everybody in consequence of having utterly failed to gain the attention of Nita Horetzki, although he had made unusually earnest efforts to join in conversation with her father. Owing to somewhat similar feelings, the artist had flung himself into a chair, and sat glaring at the black fireplace with a degree of concentration that ought to have lighted the firewood therein.
“The cause of a glacier flowing,” said the Professor, “has long been a disputed point. Some men of science have held that it is the pressure of ice and snow behind it which causes it to flow. They do not think that it flows like water, but say it is forced from behind, and crushed through gorges and down valleys, as it were, unwillingly. They say that, if left alone, as they now are, without additions, from this time forward, glaciers would no longer move; they would rest, and slowly melt away; that their motion is due to the fact that there are miles and miles of snow-fields, thousands of feet deep, on the mountain-tops and in the gorges, to which fresh snows are added every winter, so that the weight of what is behind, slipping off the slopes and falling from the cliffs, crushes down and forward that which is below; thus glaciers cannot choose but advance.”
“Ay, ay,” said the Captain, “no doubt no doubt that may be so; but why is it that, bein’ as brittle as glass, a glacier don’t come rumblin’ and clatterin’ down the valleys in small hard bits, like ten thousand millions of smashed-up chandeliers?”
“Ay, there’s the rub,” exclaimed Lewis; “what say you to that?”