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An instrument for measuring the acuteness of the sense of hearing. Itard.

An instrument for measuring the direct heating power of the sun's rays.

An instrument for ascertaining the weight or density of air and gases.

An instrument to measure the degree of sensation, by determining at how short a distance two impressions upon the skin can be distinguished, and thus to determine whether the condition of tactile sensibility is normal or altered.

A hollow cylinder to contain air. It is closed above and open below, and has its open end plunged into water.

An instrument for ascertaining the quantity of albumen in a liquid.

See Alkalimeter.

the percentage of pure alcohol, either by weight or volume. It is usually a form of hydrometer with a special scale.

Same as Alcoholometer, Alcoholometric.

An instrument for determining the expansive properties, or quality, of gluten in flour. Knight.

An instrument for measuring sensations of pain due to pressure. It has a piston rod with a blunted tip which is pressed against the skin. -- Al*gom"e*try (#), n. -- Al`go*met"ric (#), *met"ric*al (#), a. --Al`go*met"ric*al*ly, adv.

An instrument to ascertain the strength of alkalies, or the quantity of alkali in a mixture.

An instrument for taking altitudes, as a quadrant, sextant, etc. Knight.

A theodolite. Knight.

A contraction of amperometer or ampèremeter.

An instrument for measuring the strength of an electrical current in ampères.

Instrument for determining the amount of starch in a substance.

An instrument for measuring the force or velocity of the wind; a wind gauge.

An instrument to measure angles, esp. one used by geologists to measure the dip of strata.

An instrument for measuring external angles.