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It is well known that even with the best steel-tube gages, registering comparatively steady pressures, this warping of the tube inevitably takes place.
It may be remarked that this last adjustment is the proper work of the optician, since it is so difficult that the user of the telescope cannot ordinarily effect it. But the perpendicularity of the whole objective to the tube of the telescope is liable to be deranged in use, and every one who uses such an instrument should be able to rectify an error of this kind.
And then the damaged wheel was jacked up and a new shoe with its inner tube was put on and inflated. All told, the job took the boys a full half-hour, for the new shoe was a tight fit and did not want to go over the rim at first. "Hello, what do you know about this!" cried Phil, as they were finishing the blowing up of the tube. "It's raining!"
Through one of these, after exchanging a few words with one of the officials in charge of them, Esmo carried on a conversation of some length, the instrument being so arranged that while the mouth is applied to one tube another may be held to the ear to receive the reply.
The Bishop turned interrogatively towards Bright, who once more leaned over Julian with the tube in his hand. Again the little mist, the pungent odour. Julian rose to his feet and sat down again. "I am listening," he said. "First of all," began the Bishop earnestly, as he seated himself at the end of the couch on which Julian had been lying, "let me try to remove some of your misconceptions.
Torricelli, by his experiments, demonstrated the fact and invented the mercurial barometer, long known as the "Torricellian Tube." This last instrument led to another discovery; that the weight of the atmosphere varied from time to time in the same locality, and that storms and weather changes were indicated by a rising and falling of the column of mercury in the tube of the siphon-barometer.
By regulating the check valve, that is by approaching it more or less to the exit of the tube, A, the outflow of water may be regulated. It is important to adjust this so that the cylindrical flask will always be at least half full, and never over three-fourths filled.
Already she had seated herself at her desk and began to write, while I examined the metal tube and the note again. "There," she said at length, handing me the note she had written. "How does that sound?" I read it while she addressed the envelope. "Very good," I replied, handing it back.
Madame Tube clasped her hands in despair, praying to be supported under this new trial, she turned from the hard-hearted man, and with difficulty retraced her steps to the hospital. There she found Madelaine released, and nursing her brother.
Being no sportsman, Coxen did not even take the trouble to change the old percussion-cap, which had been on the tube for six months. It was enough for him that the weapon was loaded. Down the other slope of the hill, where the buck could not see him, Coxen hurried at a run, and gained the cover of the thick woods.
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