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With this they set resolutely to work and labored all day, but the sun went down before their raft was finished. They launched it, however, and getting on board, endeavored to propel it across with setting poles. Before they were half way over the raft became jammed between cakes of ice, and they were in imminent peril.
It was an immense relief to stand in the boat with the boat-hook, whose use demanded all the skill and nerve which Caius had at command. For the most part they could only propel the boat by pushing or pulling the bits of ice that surrounded it with their poles.
This moderate rate is far below the popular mark; but, in considering this important question, it should not be forgotten, that, unlike the paddle, the screw will always cooeperate with sail, and that, if a ship would go far under steam, she must be content to go gently. The natural law regulating the speed of a ship is, that the power requisite to propel her varies as the cube of the velocity.
With his still weak left arm he could not propel himself, but if he could find some one Twice, with one of the newspapers that lay in his lap, he made a feeble attempt to attract attention; but the Millionaire was used to commanding, not begging, and his action passed unnoticed. He saw then in the crowd the face of a friend, and with a despairing gesture he waved the paper again.
Intellectual education carried on by the teacher on such a system makes one think of a chauffeur who should shut up the motor of an automobile and try to propel it by the strength of his arms. He would in this case be a porter, and the automobile a useless machine.
Having gained the raft, they at once set to work to haul on board everybody within reach, and then, with the assistance of a few oars which had floated free of the broken boats remaining on the cruiser, the occupants managed to propel the raft, despite the heavy sea still running, to a large grating, to which half a dozen men were clinging, submerged to their chins.
The bellam is a long, flat-bottomed boat not unlike a punt but narrowing at each end to a point, the stem and stern-post alike ending in a high curved piece suggestive of a gondola. These craft are propelled by two men standing one at each end like gondoliers and punting the boat along by poles. If the water is too deep to bottom it they sit and propel the boat with paddles.
On finding himself receding down, instead of advancing up the current, he approached the bank, which was here very deep and perpendicular; he then sank his fingers into and pressed his right foot against the firm blue clay with which it was stratified, and by this means advanced, bit by bit, up the stream, having no other force by which to propel himself against it.
As it was no use depending on being picked up they made all sail in that direction, and so rapidly did the strong west wind propel them that on taking observations the next day they found themselves nearly one hundred and fifty miles nearer land.
The inner surfaces of many of the veins are supplied with pouch-like folds, or pockets, which act as valves to impede the backward flow of the blood, while they do not obstruct blood flowing forward toward the heart. The veins have no force-pump, like the arteries, to propel their contents towards their destination.
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