A Theoretical and Practical Treatise on Algebra: In Which the Excellencies of the Demonstrative Methods of the French Are Combined With the More Practical Operations of the English; And Concise Solutions Pointed Out and Particularly Inculcated; Designed F

Excerpt from A Theoretical and Practical Treatise on Algebra: In Which the Excellencies of the Demonstrative Methods of the French Are Combined With the More Practical Operations of the English; And Concise Solutions Pointed Out and Particularly Inculcated; Designed for Schools, Colleges, and Private Students

Quantity or magnitude is a general term applied to everything which admits of increase, diminution, and measurement.

The measurement of quantity is accomplished by means of an assumed unit or standard of measure; and the unit must be the same, in kind, as the quantity measured. In measuring length, we apply length, as an inch, a yard, or a mile, &c.; measuring area, we apply area, as a square inch, foot, or acre; in measuring money, a dollar, pound, &c., maybe taken for the unit.

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