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Updated: May 21, 2025
There is also more or less probability of serious adhesions or contractions occurring from the healing of the ulcerated surfaces. The future health and welfare of the valves depend on the fact that the inflammation has healed without contractions or adhesions.
Such a result is injurious, both as regards the efficacy of the engine, and the safety of the engine and boiler; for the large volume of hot water carried by the steam into the condenser impairs the vacuum, and throws a great load upon the air pump, which diminishes the speed and available power of the engine; and the existence of water within the cylinder, unless there be safety valves upon the cylinder to permit its escape, will very probably cause some part of the machinery to break, by suddenly arresting the motion of the piston when it meets the surface of the water, the slide valve being closed to the condenser before the termination of the stroke, in all engines with lap upon the valves, so that the water within the cylinder is prevented from escaping in that direction.
In the most primitive order that of the INARTICULATE brachiopods the two valves are held together only by muscles of the animal, and the shell is horny or is composed of phosphate of lime. The DISCINA, which began in the Algonkian, is of this type, as is also the LINGULELLA of the Cambrian.
To carry out this idea the inlet valves are furnished with two guides, which, passing upward through the stuffing-box, are attached to a hard steel cross piece, which receives the action of a bent catch turning on a pin attached to the levers, t1, t2, t3, t4.
Tommy turned kindling eyes upon him. "Go on!" "Hell," said Smithers, "gimme some tools an' I'll go through one shop an' cut the workin' force in half, just slammin' governors, reducin' valves, an' automatic cut-offs on the machines I understand!" Tommy jumped to his feet. He paced up and down, then halted and began to spout at Aten and the Keeper of Foodstuffs.
This engine was markedly similar to the six-cylindered Anzani, having all the valves mechanically operated, and with auxiliary exhaust ports at the bottoms of the cylinders, overrun by long pistons. These Albatross engines had their cylinders arranged in two groups of three, with each group of three pistons operating on one of two crank pins, each 180 degrees apart.
About seven in the evening he expired so quietly, that those about him did not perceive his departure. His body being opened, two of the valves of the aorta were found to be ossified; the air cells of the lungs unusually distended; one of the kidneys consumed, and the liver schirrous. A stone, as large as a common gooseberry, was in the gall-bladder.
These valves have given a good deal of trouble in some cases, in consequence of the frequent fracture of the bolts which guide and confine the rings; but this is only a fault of detail which is easily remedied, and the principle appears to be superior to that of any of the other metallic air pump valves at present in common use. Q. Are not air pump valves now very generally made of india rubber?
The thread was then stretched from tree to tree, and the pods, hanging like a string of candles, were then exposed to the sun for several hours. Next day, they were lightly smeared with an oiled feather, and then wrapped in oiled cotton of the Bombax ceiba, to prevent the valves from opening.
*Effect of Rheumatism.*—The disease which affects the heart more frequently than any other is rheumatism. This attacks the lining membrane, or endocardium, and causes, not infrequently, a shrinkage of the heart valves. The heart is thus rendered defective and, to perform its function in the body, must work harder than if it were in a normal condition.
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