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Sextant :: Sextant (n.) An instrument for measuring angular distances between objects, -- used esp. at sea, for ascertaining the latitude and longitude. It is constructed on the same optical principle as Hadley's quadrant, but usually of metal, with a nicer graduation, telescopic sight, and its arc the sixth, and sometimes the third, part of a circle. See Quadrant..

Gauge :: Gauge (n.) Any instrument for ascertaining or regulating the dimensions or forms of things; a templet or template; as, a button maker's gauge..

Elaiometer :: Elaiometer (n.) An apparatus for determining the amount of oil contained in any substance, or for ascertaining the degree of purity of oil..

Drift :: Drift (v. i.) to make a drift; to examine a vein or ledge for the purpose of ascertaining the presence of metals or ores; to follow a vein; to prospect.

Eudiometry :: Eudiometry (n.) The art or process of determining the constituents of a gaseous mixture by means of the eudiometer, or for ascertaining the purity of the air or the amount of oxygen in it..

Ascertainment :: Ascertainment (n.) The act of ascertaining; a reducing to certainty; a finding out by investigation; discovery.

Ozonometer :: Ozonometer (n.) An instrument for ascertaining the amount of ozone in the atmosphere, or in any gaseous mixture..

Gravimeter :: Gravimeter (n.) An instrument for ascertaining the specific gravity of bodies.

Measuring :: Measuring (a.) Used in, or adapted for, ascertaining measurements, or dividing by measure..

Hypsometer :: Hypsometer (n.) An instrument for measuring heights by observation of barometric pressure; esp., one for determining heights by ascertaining the boiling point of water. It consists of a vessel for water, with a lamp for heating it, and an inclosed thermometer for showing the temperature of ebullition..

Count :: Count (v. t.) To tell or name one by one, or by groups, for the purpose of ascertaining the whole number of units in a collection; to number; to enumerate; to compute; to reckon..

Pedometer :: Pedometer (n.) An instrument for including the number of steps in walking, and so ascertaining the distance passed over. It is usually in the form of a watch; an oscillating weight by the motion of the body causes the index to advance a certain distance at each step..

Siren :: Siren (n.) An instrument for producing musical tones and for ascertaining the number of sound waves or vibrations per second which produce a note of a given pitch. The sounds are produced by a perforated rotating disk or disks. A form with two disks operated by steam or highly compressed air is used sounding an alarm to vessels in fog.

Weight :: Weight (v. t.) A definite mass of iron, lead, brass, or other metal, to be used for ascertaining the weight of other bodies; as, an ounce weight..

Litraneter :: Litraneter (n.) An instrument for ascertaining the specific gravity of liquids.

Assay :: Assay (n.) The act or process of ascertaining the proportion of a particular metal in an ore or alloy; especially, the determination of the proportion of gold or silver in bullion or coin..

Baromacrometer :: Baromacrometer (n.) An instrument for ascertaining the weight and length of a newborn infant.

Evaporometer :: Evaporometer (n.) An instrument for ascertaining the quantity of a fluid evaporated in a given time; an atmometer.

Barometer :: Barometer (n.) An instrument for determining the weight or pressure of the atmosphere, and hence for judging of the probable changes of weather, or for ascertaining the height of any ascent..

Anemometry :: Anemometry (n.) The act or process of ascertaining the force or velocity of the wind.

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