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This invention was speedily followed by a lot of others, water-wheels, curious doorlocks and latches, thermometers, hygrometers, pyrometers, clocks, a barometer, an automatic contrivance for feeding the horses at any required hour, a lamp-lighter and fire-lighter, an early-or-late-rising machine, and so forth.
As soon as it began Bradley got the axe and went up stairs and smashed his hydrometers, hygrometers, barometers and thermometers. Then he cut down the pole that upheld the weathercock and burned the manuscript of the book which he was writing in explanation of his system. He leans on "Old Probs" now when he wants to ascertain the probable state of the weather.
"To determine the temperature of the dew point by Daniell's dew point hygrometer and Regnault's condensing hygrometer, and by the use of the dry and wet bulb thermometers, as ordinarily used, and their use when under the influence of the aspirator, causing considerable volumes of air to pass over both their bulbs, at different elevations, as high as possible, but particularly up to heights where man may be resident, or where troops may be located, as in the high table-lands and plains of India; with the view of ascertaining what confidence may be placed in the use of the dry and wet bulb thermometers at those elevations, by comparison with Daniell's and Regnault's hygrometers; and also to compare the results as found by the two hygrometers together.
Another invention of Bradley's was a scientific system of foretelling the weather. He had a lot of barometers, hygrometers and such things in his house, and he claimed that by reading these intelligently and watching the clouds, in accordance with his theory, a man could prophesy what kind of weather there would be three days ahead.
The Cape Meteorological Commission has sent Graham the following instruments with a request that he would take regular observations An aneroid barometer. A Fortin mercurial barometer. Dry and wet bulb hygrometers. A maximum thermometer. A minimum thermometer. A five-inch rain gauge. The hygrometers and thermometers are to be kept in a Stevenson's screen.
His books, his herbals, his set of pigeon-holes, his instruments of precision, his chemical apparatus, his collection of thermometers, barometers, hygrometers, rain-gauges, spectacles, compasses, sextants, maps, plans, flasks, powders, bottles for medicine-chest, were all classed in an order that would have shamed the British Museum.
When the rain is gathering from the south or west, and those flowers and herbs which serve as natural hygrometers close their leaves, men have no occasion to consult the stars for what the clouds and the earth are telling them.
The hair hygrometers commonly sold to incubator operators are known by scientists to be absolutely unreliable.
Barometers, hygrometers, and similar instruments of great delicacy can be constructed on the principle of the odoroscope; and it may also be used in determining the character or pressure of gases and vapors in which it has been placed.
The observation of rain-gauges and hygrometers at the same three descriptions of locality. In addition to the ordinary hours of observation, special readings of the thermometers should be made as often as possible at a change of wind and throughout the course of the short hot breezes alluded to already, in order to admit of the recognition and extension of Herr Rivoli's comparison.
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