The requisites for a successful ball are good music and plenty of people to dance. An English writer says, "The advantage of the ball is, that it brings young people together for a sensible and innocent recreation, and takes them away from silly, if not from bad ones; that it gives them exercise, and that the general effect of the beauty, elegance and brilliancy of a ball is to elevate rather than to deprave the mind." It may be that the round dance is monopolizing the ball room to a too great extent, and it is possible that these may be so frequent as to mar the pleasure of some persons who do not care to participate in them, to the exclusion of "square" and other dances. America should not be the only nation that confines ball room dancing to waltzes, as is done in some of our cities. There should be an equal number of waltzes and quadrilles, with one or two contra dances, which would give an opportunity to those who object (or whose parents object) to round dances to appear on the floor. PREPARATIONS FOR A BALL. There should be dressing-rooms for ladies and gentlemen, with a servant or servants to each. There should be cards with the names of the invited guests upon them, or checks with duplicates to be given to the guests ready to pin upon the wraps of each one. Each dressing-room should be supplied with a complete set of toilet articles. It is customary to decorate the house elaborately with flowers. Although this is an expensive luxury, it adds much to beautifying the rooms. THE MUSIC. Four musicians are enough for a "dance." When the dancing room is small, the flageolet is preferable to the horn, as it is less noisy and marks the time as well. The piano and violin form the mainstay of the band; but when the rooms are large enough, a larger band may be employed. THE DANCES. The dances should be arranged beforehand, and for large balls programmes are printed with a list of the dances. Usually a ball opens with a waltz, followed by a quadrille, and these are succeeded by galops, lancers, polkas, quadrilles and waltzes in turn. INTRODUCTIONS AT A BALL.