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A specific gravity bottle; a standard flask for measuring and comparing the densities of liquids. [Also written pyknometer.]

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

An instrument used for measuring the expansion of solid bodies by heat.

The art of measuring degrees of heat, or the expansion of bodies by heat.

An instrument for measuring the intensity of heat radiating from a fire, or the cooling influence of bodies. It is a differential thermometer, having one bulb coated with gold or silver leaf. [R.]

An instrument for measuring altitudes, variously constructed and mounted for different specific uses in astronomy, surveying, gunnery, etc., consisting commonly of a graduated arc of 90º, with an index or vernier, and either plain or telescopic sights, and usually having a plumb line or spirit level for fixing the vert…

A piece of hollow type metal, lower than type, and measuring two or more pica ems in length and breadth, used in the blank spaces at the beginning and end of chapters, etc. Quotation marks (Print.), two inverted commas placed at the beginning, and two apostrophes at the end, of a passage quoted from an author in his ow…

An instrument designed for measuring the mechanical effect of radiant energy.

A way of measuring in which the commodity measured was made even with the top of the measuring vessel by rasing, or striking off, all that was above it. Burrill.

To cream; to mantle. [Scot.] A huge pewter measuring pot which, in the language of the hostess, reamed with excellent claret. Sir W. Scott.

t are pivoted together at one end, and a graduated arc, -- used by military engineers for measuring and laying off angles of fortifications.

rebounding of a firearm when discharged. Recoil dynamometer (Gunnery), an instrument for measuring the force of the recoil of a firearm. -- Recoil escapement See the Note under Escapement.

; contemplative; as, a reflecting mind. Reflecting circle, an astronomical instrument for measuring angless, like the sextant or Hadley's quadrant, by the reflection of light from two plane mirrors which it carries, and differing from the sextant chiefly in having an entire circle. -- Reflecting galvanometer, a galvan…

A contrivance for exhibiting and measuring the refraction of light.

An instrument for measuring currents, especially the force or intensity of electrical currents; a galvanometer.

An instrument, acting on the principle of Pitot's tube, for measuring the velocity of a fluid current, the speed of a ship, etc.

An instrument for measuring.

A measuring instrument consisting of a graduated bar of wood, ivory, metal, or the like, which is usually marked so as to show inches and fractions of an inch, and jointed so that it may be folded compactly. A judicious artist will use his eye, but he will trust only to his rule. South.

An instrument for measuring the amount of salt present in any given solution. [Written also salometer.]

The art or process of measuring the amount of salt in a substance.