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Updated: May 31, 2025
As for the temporary prolongations or pseudopodia which the amoeba seems to make, they would be not so much given out by it as attracted from it by a kind of inhalation or suction of the surrounding medium. In the same way we may perhaps come to explain the more complex movements which the Infusorian makes with its vibratory cilia, which, moreover, are probably only fixed pseudopodia.
Yarrow's patent water tight ash pans are fitted to each boiler, to prevent the fire being extinguished by a sudden influx of water into the stokehold. There is an independent centrifugal pumping engine arranged to take its suction from any compartment of the boat. There are also steam ejectors and hand pumps to each compartment.
We cannot inhale too much oxygen, while we can take too much food; therefore, the greater the lung capacity the better the digestion. We referred to the suction power of the empty chest cavity and its stimulating effect upon the fluids of the body.
Thence they converge to the mouth, over which they meet, and beyond are free, being hollow, thin bands of chitine, meeting like the maxillæ, or tongue, of butterflies to form a hollow tube for suction. The mandibles each suddenly end in a curved, slender filament, which is probably used as a tactile organ to explore the best sites in the flesh of their victim for drawing blood.
It was horrible. For an instant I thought the poor man entwined by the devilfish might be torn loose from its powerful suction. Seven arms out of eight had been chopped off. Brandishing its victim like a feather, one lone tentacle was writhing in the air.
At her frightened tone Coquenil calmed himself and answered gently: "It's like a big electric fan, it's drawing air out of this room very fast, with a powerful suction, and I'm afraid unless " Just then there came a sharp pop followed by a hissing noise as if some one were breathing in air through shut teeth. "There goes the first one! Come over here!"
The other breathed a cautious prolonged sigh of relief "You'd better light a fresh one, hadn't you?" he asked, observing with a kind of contemptuous tolerance the old man's efforts to ignite a cigar which had more than once unrolled like a carpenter's shaving in his unaccustomed fingers, and was now shapelessly defiant of both draught and suction.
Joe nodded to show that was what he wanted, and he moved as close as he dared to where the lead-weighted foot was caught. Joe had to be careful in two respects. He did not dare go too near the pipe, for a stream of water was rushing through it and there was considerable suction, though not as much as there would be when the valve was fully opened.
The tide was unusually high, and scarcely receded with the ebb, though the surf increased; the waves came in with constant rush and wail, and with an ominous rattle of pebbles on the little beaches, beneath the powerful suction of the undertow; and there were more and more of those muffled throbs along the shore which tell of coming danger as plainly as minute-guns.
We had seen two waterspouts in the morning between us and the land. It might possibly have happened that the suction which forms them drew up these unfortunate crabs and crabesses, and discharged them with unrelenting fury, through the medium of a dark, lowering cloud upon our decks.
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