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So long as the zinc surface remains intact, the underlying metal is protected from corrosive action, but a mechanical or other injury to the zinc coating that exposes the metal beneath, in the presence of moisture causes a very rapid corrosion to be started, the galvanic action being changed from the zinc positive to zinc negative, and the iron, as the positive element in the circuit, is corroded instead of the zinc.
But they had good times around the house, and out in the old barn. Bert and Harry made snowshoes out of barrel staves, fastening them to their feet with straps. They managed to walk fairly well on the crust. The lake was still covered with a coating of snow, and there was no skating, nor could the ice-boat be used. Mr.
Gallegher opened the big gate noiselessly, and worked nervously at the hitching strap. The knot was covered with a thin coating of ice, and it was several minutes before he could loosen it. But his teeth finally pulled it apart, and with the reins in his hands he sprang upon the wheel.
"The arbutus," he explained, with a lingering touch of his finger upon the blossoms. "Smell them, monsieur. I found them in Connecticut last spring. Are they not well suited to be the first flowers of this wild land? Repellent without, see how rough the leaves are to your finger, but fragrant and beautiful under its harsh coating. Life in the Colonies grew to seem to me much the same."
This was stifling work, for the soft powder ran back as fast as it was dug away. A half hour at least was consumed in reaching the bard surface beneath. The coating of dust was nearly three feet deep. As Ned climbed out of the little excavation Alan held the candle down. To the astonishment of the boys a beautiful blue sheen met their gaze. "Turquoise flooring!" shouted Ned. It was true.
As the Magi held the four elements of earth, air, fire, and water to be sacred, they feared to either bury, burn, sink, or expose to air the corrupting bodies of their deceased. Therefore, it was their practice to envelop the corpse in a coating of wax or bitumen, so as to hermetically seal it from immediate contact with either of the four sacred elements.
The humidity of the subsoil, at the time of the spring showers, would reduce the little earthen alcove to a sort of pap. The coating of saliva is an excellent preservative against this danger. It is so delicate that we suspect rather than see it; but its efficacy is none the less evident. I fill a cell with water. The liquid remains in it quite well, without any trace of infiltration.
A tacit contract, indeed, appears to exist between the sharks and these people, for I never saw, nor can I remember ever having heard of any injury done by one to the other. By the time my answer was written, the sun had dried up the spray on the poor fellow's body, leaving such a coating of salt, that he looked as if he had been dusted with flour.
There was the faintest possible residue, like a coating of impalpable dust. Calhoun guessed its significance and the knowledge was intolerable. But he said between clenched fists. "Where do I go now?" "Anywheres," said the first man. "Nobody'll bother you. Some normals try to keep you from getting near'em, but you can do as you please." He added disinterestedly. "To them, too. No police out here!"
If the grub acts on its own inspiration, if it ceases to prolong its boring directly it recognizes that the outer coating, auscultated from time to time, is sufficiently thin, what will it do under the conditions of the present test?
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