from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A sensitive kind of barometer, in which the pressure of the atmosphere, acting upon a liquid in the lower part of the instrument, compresses a gas in the upper part.
from the GNU version of the Collaborative International Dictionary of English
- n. A sensitive kind of barometer, in which the pressure of the atmosphere, acting upon a liquid, as oil, in the lower portion of the instrument, compresses an elastic gas in the upper part.
from The Century Dictionary and Cyclopedia
- n. An instrument for measuring the pressure of a current.
- n. A form of barometer in which the pressure of the atmosphere is balanced partly by the weight of a column of liquid and partly by the elastic pressure of a confined mass of gas.
-- I think that every ship ought to have either a barometer or sympiesometer, which is an efficient substitute for a barometer.
In the previous observations, general reference has been made to mercurial barometers of the ordinary kind; but, excepting the construction of the instruments themselves, those observations apply to all barometers, wheel -- aneroid -- or metallic -- and likewise, of course, to the sympiesometer, which is a modified barometer.
When boiling our coffee I took observations with a good boiling-point thermometer, as well as with the sympiesometer, and we then enjoyed our evening meal and the noble prospect that lay before us.
Our sympiesometer showed us that we were twenty-eight hundred feet above the sea.
The height, as measured by a sympiesometer, was about 2,800 feet.
After a march of an hour and three quarters, 'covering five indirect and three direct miles in a south-eastern rhumb, we reached Banza Nkaye, the royal village, where the sympiesometer showed 1430 feet.
The liquid is raised or depressed by an increase or diminution in the density of the atmosphere, and change of temperature is allowed for, by the sliding scale of the instrument being always set to agree with the height of the mercury in the attached thermometer, bringing the _pointer_ on the sliding scale of the sympiesometer to the same degree on the inverted scale (over which it slides) as is indicated by the thermometer.
In the sympiesometer a gas is used, which presses on the confined surface of the liquid with an uniform pressure at an equal state of temperature.
After a march of an hour and three quarters, ‘covering five indirect and three direct miles in a south-eastern rhumb, we reached Banza Nkaye, the royal village, where the sympiesometer showed 1430 feet.