Ample instructions for the barometer and thermometer

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published, 1825 - Barometers - 36 pages

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Page 29 - ... chiefly in consequence of the moisture they contain, which being frozen into ice, and so expanding as water is known to do when frozen, it bursts, and rends any thing in which it is contained, as plants, trees, stones, and large rocks.
Page 36 - When the wind is SW during summer or autumn, and the temperature of the air unusually cold for the season, both to the feeling and the thermometer, with a low barometer, much rain is to be expected.
Page 13 - A wind generally sets from the sea to the land during the day, and from the land to the sea during the night, especially in hot climates.
Page 34 - When the air is much heated, it will ascend toward the upper part of the atmosphere, and the adjacent air will rush in to supply its place ; and therefore, there will be a stream or current of air from all parts towards the place where the heat is.
Page 26 - This table and the accompanying remarks are the result of many years' actual observation ; the whole being constructed on a due consideration of the attraction of the sun and moon in their several positions respecting the earth ; and will, by simple inspection, show the observer what kind of weather will most probably follow the entrance of the moon into any of her quarter», and that so near the truth as to be seldom or never found to fail.
Page 3 - In winter, spring, and autumn, the. sudden falling of the mercury, and that for a large space, denotes high winds and storms; but in summer it presages heavy showers, and often thunder. It always sinks...
Page 1 - ... inches above its surface in the vessel, sometimes more, and at other times less, as the weight of the air is Varied by winds and other causes. That the quicksilver is kept up in the tube by the pressure of the atmosphere upon that in the bason, is evident ; for, if the bason and tube be put under a glass, and the air be then taken out of the glass, all the quicksilver in the tube will fall down into the bason ; and if the air be let in again, the quicksilver will rise to the same height as before....
Page 13 - From the foregoing statements it may be safely inferred that " the mean height of the barometer at the level of the sea being the same in every part of the globe...
Page 31 - When the sun or moon is seen through a thin cloud, a portion of the cloud round the sun or moon appears lighter than the rest, and this luminoue disc is called a corona.

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