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An instrument for measuring the strength of electro-dynamic currents.

ch indicates the presence of electricity (usually called an electroscope). Balance electrometer. See under Balance.

An instrument for measuring the force or amount of endosmotic action.

An instrument for measuring energy in ergs.

ice for measuring, or an instrument for indicating, energy expended or work done; a dynamometer. -- Er`go*met"ric (#), a.

An instrument for measuring the diameters of minute particles or fibers, from the size of the colored rings produced by the diffraction of the light in which the objects are viewed.

Same as Æsthesiometer.

An instrument for the volumetric measurement of gases; -- so named because frequently used to determine the purity of the air.

An instrument for ascertaining the quantity of a fluid evaporated in a given time; an atmometer.

An instrument for measuring the extension of a body, especially for measuring the elongation of bars of iron, steel, or other material, when subjected to a tensile force.

An instrument for measuring the height of water in a river; a river gauge.

(Photog.) An assisting instrument for focusing an object in or before a camera. Knight.

Fumitory. [Obs.]

Same as Galactometer.

quality of milk (i.e., its richness in cream) by determining its specific gravity; a lactometer.

an electric current, usually by the deflection of a magnetic needle. Differential galvanometer. See under Differental, a. -- Sine galvanometer, Cosine galvanometer, Tangent galvanometer (Elec.), a galvanometer in which the sine, cosine, or tangent respectively, of the angle through which the needle is deflected, is p…

An apparatus for holding and measuring of gas; in gas works, a huge iron cylinder closed at one end and having the other end immersed in water, in which it is made to rise or fall, according to the volume of gas it contains, or the pressure required.

One skilled in geometry; a geometrician; a mathematician. I. Watts.

A thermometer specially constructed for measuring temperetures at a depth below the surface of the ground.

See Gleucometer.