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ount of nitrogen or some of its compounds in any substance subjected to analysis; an azotometer.

A nitro derivative of methane obtained as a mobile liquid; -- called also nitrocarbol.

Any one of the set of elements which, as contrasted with the metals, possess, produce, or receive, acid rather than basic properties; a metalloid; as, oxygen, sulphur, and chlorine are nonmetals.

Not metallic.

A verse containing eight feet; as, -- Deep'' in|to'' the | dark''ness | peer''ing, | long'' I | stood'' there | wond'''ring, | fear''ing. Poe.

An instrument attached to the wheel of a vehicle, to measure the distance traversed; also, a wheel used by surveyors, which registers the miles and rods traversed.

Of or pertaining to the odometer, or to measurements made with it.

Serving to measure distance on a road. [R.] Sydney Smith.

Measurement of distances by the odometer.

See Alcoholometer.

An instrument for indicating directly resistance in ohms.

An instrument for ascertaining the weight and purity of oil; an elaiometer.

An instrument for measuring the rain that falls; a rain gauge.

An instrument for measuring the variations in size of the internal organs of the body, as the kidney, spleen, etc.

An electric wave meter.

An instrument or machine for measuring work done, especially for ascertaining the number of rotations made by a machine or wheel in manufacturing cloth; a counter. Ure.

An instrument devised by Helmholtz for measuring the size of a reflected image on the convex surface of the cornea and lens of the eye, by which their curvature can be ascertained.

An instrument with a revolving wheel for measuring a curved line, as on a map.

An instrument for measuring the limits of distincts vision in different individuals, and thus determiming the proper focal length of a lens for correcting imperfect sight. Brande & C.

An instrument for measuring the distance of distinct vision, mainly for the selection of eveglasses.