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A brief or informal note in writing of some transaction, or an outline of an intended instrument; an instrument drawn up in a brief and compendious form. Memorandum check, a check given as an acknowledgment of indebtedness, but with the understanding that it will not be presented at bank unless the maker fails to take…

An instrument of the ancients for finding two mean proportionals between two given lines, required in solving the problem of the duplication of the cube. Brande & C.

An instrument like a pianoforte, but having metal bars instead of strings.

An instrument which registers meteorologic phases or conditions.

An instrument for measuring the position, length, and direction, of the apparent path of a shooting star.

An instrument for measuring, and usually for recording automatically, the quantity measured. Dry meter, a gas meter having measuring chambers, with flexible walls, which expand and contract like bellows and measure the gas by filling and emptying. -- W, a gas meter in which the revolution of a chambered drum in water…

An instrument, resembling a eudiometer, to detect the presence and amount of methane, as in coal mines.

An instrument for measuring colors.

An instrument attached to a locomotive for recording its speed and the number and duration of its stops.

An instrument for measuring the size of the womb. Knight.

An instrument consisting of a short pendulum with a sliding weight. It is set in motion by clockwork, and serves to measure time in music.

Measurement of time by an instrument.

An instrument for cutting or scarifying the uterus or the neck of the uterus.

An instrument for measuring conductivity.

An instrument for recording minor fluctuations of atmospheric pressure, as opposed to general barometric surges.

An instrument for making faint sounds audible, as to a partially deaf person.

An instrument for executing minute writing or engraving.

An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of objects which subtend minute angles. The measurement given directly is that of the image of the object formed at the focus of the object glass. Circular, or Ring, micrometer, a metallic ring fixed in the foc…

An instrument for noting minute portions of time.

An instrument for intensifying and making audible very feeble sounds. It produces its effects by the changes of intensity in an electric current, occasioned by the variations in the contact resistance of conducting bodies, especially of imperfect conductors, under the action of acoustic vibrations.