MEASURE, a definite unit of capacity or extent, fixed by law or custom, by which rela tive sizes and capacities are ascertained and expressed; as, a yard, a measure of length; a gallon, a measure of capacity; a square foot, a measure of area; a cubic foot, a measure of volume, etc. See WEIGHTS AND MEASURES.
Lineal The measure of lines or distances; the standard unit of lineal measure in the United States is the yard. The system is based on the law of nature that the force of gravity is constant at the same point of the earth's surface, and, consequently, that the length of a pendulum which oscillates a certain number of times in a given period is also constant.
Unit of given quantity, used as a standard of comparison in measuring a quantity of the same kind. Every kind of quan tity has its own unit of measure, and under different circumstances the same kind of quan tity may have different units of measure.
Line of The line of intersec tion of the primitive plane, with a plane passing through the, axis of the primitive circle and the axis of the circle to be projected.
Measure of The right angle being taken as the angular unit, its subdivisions are degrees, minutes and seconds. The right angle
contains 90 degrees, the degree 60 minutes and the minutes 60 seconds. All smaller fractions are expressed decimally in terms of the second.
Measure of The measure of magnification, or magnifying power of any optical instrument, is the ratio of the magnitude of the image to the magnitude of the object, or, more precisely, the ratio of the apparent diameter of the image to that of the object.
Measure of a Its logarithm, in any system of logarithms, or the exponent of the power to which the ratio is equal, the exponent of some given ratio being assumed as unity.
In The quantity of notes which are placed in the bar, and which is generally called the time, of which there are but two kinds, namely, common time, containing an equal quan tity of notes in the bar, and triple time, contain ing an unequal quantity. Common time is gen erally marked with a C at the beginning, which means that every bar contains four crotchets, or their value in other notes. There are also other kinds of common time which are marked f. 4, Triple time is marked I, t.