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Updated: May 7, 2025
Fortunately we burned no bearings before our error was discovered and so learned a valuable lesson more cheaply than we deserved. Keeping the radiator protected against freezing is not complicated. Nearly any filling station has the necessary hydrometer.
Many other pretty things he showed us, and did give me a glass bubble, to try the strength of liquors with. Robert Boyle's hydrometer, which he described in a paper in the "Philosophical Transactions" for June, 1675, under the title of a "New Essay instrument."
It makes me wish I had done something, so I had to hide out in the hills. And every day at a certain time, I can come up here where that hydrometer thing was before it burned, and signal to you. And we'll find a place where I can leave magazines and things like that, and you can come and get them.
Although the hydrometer is seldom applied to domestic uses, yet it might be used for many ordinary purposes which could scarcely be attained by any other means. The slightest adulteration of spirits, or any other liquid of known quality, may be instantly detected by it; and it is recommended by its cheapness, the great facility of its manipulation, and the simplicity of its results. Ibid.
The Twaddell hydrometer, or instrument for measuring the specific gravities of liquids, is so constructed that when it stands in water, the water is just level with its zero or 0° mark. Well, since in your reading of methods and new processes, you will often meet with specific gravity numbers and desire to convert these into Twaddell degrees, I will give you a simple means of doing this.
Will you now explain how the proper quantity of water to be blown out is determined? A. By means of the salinometer, which is an instrument for determining the density of the water, constructed on the principle of the hydrometer for telling the strength of spirits. Some of the water is drawn off from the boiler from time to time, and the salinometer is immersed in it after it has been cooled.
It is extensively consumed in the manufacture of handles to knives and forks, and cutlery of every description; combs of all kinds; brushes of every form and use; billiard-balls, chess-men, dice, dice-boxes; bracelets, necklaces, rings, brooches; slabs for miniature portraits, pocket-tablets, card-cases; paper-knives, shoeing-horns, large spoons and forks for salad; ornamental work-boxes, jewel-caskets, small inlaid tables; furniture for doors and cabinets; pianoforte and organ keys; stethoscopes, lancet-cases, and surgical instruments; microscopes, lorgnettes, and philosophical instruments; thermometer scales, hydrometer scales, and mathematical instruments; snuff-boxes, cigar-cases, pipe-tubes; fans, flowers, fancy boxes; crucifixes, crosiers, and symbols of faith; idols, gods, and symbols of superstition; vases, urns, sarcophagi, and emblems of the dead; temples, pagodas; thrones, emblems of mythology; and, in short, there is hardly a purpose in the useful and ornamental arts to which ivory is, or has not been in some way extensively employed.
When he could look down to the knoll where the hydrometer stood, he saw that it was not yet afire, but that the flames were working that way faster even than he had feared. Between gasps he shouted her name as Hank Brown had repeated it to him. He stopped on a ledge and stared wildly, in a sudden panic, lest he should somehow miss her.
He lived according to a minutely elaborated, half-philosophical, half- practical system, like clock-work; not this alone, but also by the thermometer, barometer, aerometer, hydrometer, Hippocrates, Hufeland, Plato, Kant, Knigge, and Lord Chesterfield. But at times he had violent attacks of sudden passion, and gave the impression of being about to run with his head right through a wall.
Hence the marine aquarium must be replenished with fresh water, until the proper specific gravity, as indicated by the hydrometer, is restored. The aquarium may be found some morning with a deep and permanent green stain discoloring the water.
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