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Updated: May 31, 2025
Perry, looking on, asked sarcastically if he was feeling the engine's pulse, and Joe haughtily replied that he wanted to make sure the cylinders weren't overheating.
As soon as the mechanical fuel-shifter has been adopted, and the boilers have been properly insulated in order to prevent the overheating of the stoke-hole, the stoker will be raised to the rank of a secondary engineer, and his work will cease to be looked upon as in any sense degrading.
It is most important that one should leave the bath immediately upon feeling any sense of weakness, dizziness or discomfort of any sort. If you feel oppressed by a sense of overheating, do not linger in the water but get out of it immediately. You will usually find that your face will perspire freely within a few minutes after being in the bath. This indicates its rapid eliminative effect.
On inquiring into the matter, he discovered that the same thing frequently occurred in other places where gas-engines were in use; and this caused him to design a contrivance to put an alarm-bell into action at the instant when the water ceased to flow, and so enable any overheating of the engine, and injuries thereby resulting, to be prevented in time.
"I'll go down and see the firemen and stir them up and put some more oilers to work in the screw well, to lubricate the shaft so as to prevent the bearings from overheating." "That's your sort, my hearty," said Stoddart. "So you can return on deck, Haldane, and tell the skipper and Mr Stokes that everything shall be done down here by us to overhaul your `ghost-ship."
If both boats keep going at the speed they're using now, and neither has an accident, we stand to come in half a mile in the lead." "Good strategy, that, Jack!" cried Jacob Farnum, his eyes gleaming. "To let the other fellow take the risk of overheating his machinery all day, while we do it only in the last part of the race. My boy, I'm hopeful we may win yet." "So am I, sir," muttered Benson.
With the higher pressures now adopted, the danger arising from overheating is much more serious, and the necessity is absolute of maintaining the heating surfaces free from deposit. This can be done only by filling the boiler with fresh water in the first instance, and maintaining it in that condition. To do this two methods are adopted, either separately or in conjunction.
The change chemically is that of a chemical compound to a mixture of carbon and iron, so that in a chemical sense it resembles cast iron. The change physically is that of crystallization, being due partly to chemical change and partly to the effect of heat. I have procured a specimen of steel showing beautifully the effect of overheating.
The first boiler was exceedingly light, but the workmanship, as far as putting the tubes together was concerned, was very bad, and it was found impossible to so adjust the supply of water as to make dry steam without overheating and destroying the tubes. 'Before making another boiler I obtained a quantity of copper tubes, about 8 feet long, 3/8 inch external diameter, and 1/50 of an inch thick.
There would be none of the overheating during the middle of the day followed by the chilling at night which are caused by a large expanse of glass. On the other hand, there should not be openings on opposite sides of the house to create a draft. Also, the rat and vermin question must be considered. It might be necessary to have wire screens made to fit firmly over the cloth at night.
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