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The coherer was a little tube of glass not as long as your finger, and smaller than a lead pencil, into each end of which was tightly fitted plugs of silver; the plugs met within a small fraction of an inch in the centre of the tube, and the very small space between the ends of the plugs was filled with silver and nickel dust so fine as to be almost as light as air.
He inspected the needle valve with much care, and had Foster on the front seat trying to start her afterwards. He looked for short circuit. He changed the carburetor adjustment, and Foster got a weary chug-chug that ceased almost as soon as it had begun. He looked all the spark plugs over, he went after the vacuum feed and found that working perfectly.
There is a hole through the valve so as to conduct away any steam which may enter within the ring by leakage, and the ring is kept tight against the back of the casing by means of a ring situated beneath the bearing ring, provided with four lugs, through which bolts pass tapped into bosses on the back of the valve; and, by unscrewing these bolts, which may be done by means of a box key which passes through holes in the casing closed with screwed plugs, the lower ring is raised upwards, carrying the bearing ring before it.
"No, sir," went on Bill, "them plugs has to be druv from inside; an' makin' free, genelmen, I'd make 'em twice as long as them you have ready." "Twice as long?" snorted Barry. "D' you mean these are all useless?" "P'raps not quite useless, Cap'n, but they ain't no blessed good, an' I bet my head on that.
Ernest laid a hand on the man's shoulder. "The thing is, Tom, we will have to look for a motive. Now what earthly motive can anyone have?" "Search me!" said Tom. "Whoever is doing it doesn't want to hurt Mr. Jardin here, because the damage is always to something that will keep the plane from rising. For instance, yesterday the spark plugs had mud in 'em.
The next cast was a small one, being a sailor's little 'ditty bag', containing needles, thread, and other sewing utensils, then came a razor-case, followed by two or three separate plugs of negro-head, which were fished up from the bottom of the now empty receptacle. These various matters, being inspected, I produced the few things which I had myself brought.
There must be a mud hole opposite the edge of each water space, if the fire box be square, to enable the boiler to be easily cleaned out, and these holes are most conveniently closed by screwed plugs made slightly taper.
Loose plugs of cotton are placed at the top of each arm and between the soda lime and the calcium chloride. A small tube containing calcium chloride is connected with the Geissler bulb proper by a ground joint and should be wired to the bulb for safety. This is designed to retain any moisture from the hydroxide solution.
"Will you sell it for half the profit if I furnish the tobacco?" I said "yes." So he sent the same day for a box of tobacco about five hundred plugs. When the tobacco came the box was sawed in two and one-half sent up to my room.
Into the room of the lodger came Dr. August Moehrlein. The coals of the brazier were out, the batter had been turned into cakes, the razor was covered with hair, four waxen plugs lay by the crocheting hook. The process was over.
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