# EFFERVESCENCE

, is popularly used for a light ebullition, or a brisk intestine motion, produced in a liquor by the first action of heat, with any remarkable separation of its parts.

EFFICIENT *Cause,* is that which produces an effect.
See Cause and Effect.

, in Arithmetic, are the numbers given for an operation of multiplication, and are otherwise called the factors. Hence the term coefficients in Algebra, which are the numbers prefixed to, or that multiply the letters or algebraic quantities.