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In the act of opening, it was made to crush certain berries, and the oil they yielded, was carried by a small duct to the hinge, which was thus made to turn easily, and was prevented from creaking.
This man, grotesque in full panoply of space armor, leaned against the duct, and as he leaned a drill bit deeper and deeper into the steel wall of the pipe. Soon it broke through, and the slight rush of air was stopped by the insertion of a tightly fitting rubber tube. The tube terminated in a heavy rubber balloon, which surrounded a frail glass bulb.
The cause, which is trivial and easily removed, should be properly understood, and cannot be given in clearer language than that used by Professor Tyndall: "Behind the tympanic membrane exists a cavity the drum of the ear in part crossed by a series of bones, and in part occupied by air. This cavity communicates with the mouth by means of a duct called the Eustachian tube.
"I come in through the duct, Cap'n," Thomas said. "I check the ducts every day. You know, Cap'n," he said shaking his head, "they's some bad laid-out ductin' in this here system. If I didn't keep after it, you'd be gettin' clogged ducts all the time. So I jist go through the system and keep her clear." From somewhere, hope began again. "Where do these ducts lead?" I asked.
In starting to pull in the draw rope a wire brush should be attached to the wire and to this again the rope, and when the brush arrives at the distant end of the duct it very likely will bring with it a miscellaneous collection of material which for the good of the cable had better be in the manhole than in the duct.
But that only raises the further question, What is a tonsil? And to that no answer can be given but Echo's. They are one of the conundrums of physiology. All we know of them is that they are not true glands, as they have neither duct nor secretion, but masses of simple embryonic tissue called lymphoid, which has a habit of grouping itself about the openings of disused canals.
"Water plenty!" cried the chief, drawing his foot from the unexpected bath, and then commenced clearing the place from the leaves and earth with which it was partially filled. They soon found it was an artificial duct about one foot deep and two feet wide, built of the same kind of grey stone as the rest of the ruins around, and still supplied with water.
Here the drop was so great that the terraces made bastions that towered proudly on the very knife-edge of decision between the seaweed and the cliffs. A runnel tamed to a bamboo duct did them Ganymede service. For a paddyfield is perpetually thirsty. It was the season of repairing of dykes and ditches in rice chronology, a much more complicated annal than might be thought.
The reel or drum carrying the cable should be mounted on wheels or jacks and placed on the same side of the manhole as the duct into which the cable is to be drawn, and must always be so placed that the cable will run off the top of the reel. There are several methods of attaching the draw rope to the cable.
Many other receptacles of peculiar fluids disgorge their contents, when the ends of their ducts are stimulated; as the gall bladder, when the contents of the duodenum stimulate the extremity of the common bile duct: and the salivary glands, when the termination of their ducts in the mouth are excited by the stimulus of the food we masticate.
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