MULLIONS, in pointed architecture, all those parts of windows which divide the light into and are either curved or straight.
Vertical mullions are called munnions ; and those which run horizontally are called transow. The whole of the mullions of a window above the springing of the arch are called the head-work.
Al ULTILATERA L; (from the Latin. milling, many, and latera, sides) in geometry, a term applied to figures which have more than four sides or angles, more usually called Polygons.
Jl ULTIPLICATION. (from the Latin, multiplicatio) the act of multiplying, or increasing a number. Aeetnately speaking. in every multiplication, the multiplier must always be considered as a number; and it is easy to conceive a quan thy of any kind multiplied by a number. But to talk of a pound multiplied by a pound, a debt by a debt, or a line by a line, &c., is unintellbrible. However, by analogy, in the application of algebra to geometry, we !fleet with such expres anti nothing is more common than to find A a X s c, to denote the rectangle A a CD. the length of which is A B,
and the breadth n c. But this is unly to be understood by analogy ; because, if the number expressing the measure of the side A B were multiplied by the number expressing* the measure of B C, the product would express the measure of A B C D.
The sign of multiplication mostly used among algebraists, is X. But the Germans, after Leibnitz, only make use of a point placed between the quantities multiply ing each other, thus : u is the same as a x h ; A B . B 0, the Sallie as A B XBO, or the recta nIde of A n into a c.
f-HOUSE, a small strong apartment in cathedral and collegiate ehurches, castles, colleges, or the like. destined for keeping the seal, evidences, charters, &c., of such church, collep-es, &c., called munimentsolr miniments.