backward, until the movement has become second nature. All this must precede any attempt to turn.

The turning of the Boston is simplicity itself, but it is, nevertheless, the one point in the instruction which is most bothersome to learners. The turn is executed upon the ball of the supporting foot, and consists in twisting half round without lifting either foot from the ground. In this, the weight is held altogether upon the supporting foot, and there is no crossing.

In carrying the foot forward for the second movement, the knees must pass close to one another, and care must be taken that the entire half turn comes upon the last count of the measure.

To sum up:—

Starting with the weight upon the left foot, step forward, placing the entire weight upon the right foot, as in the illustration facing page 14 (count 1); swing left leg quickly forward, straightening the left knee and raising the right heel, and touch the floor with the extended left foot as in the illustration facing page 16, but without placing any weight upon that foot (count 2); execute a half-turn to the left, backward, upon the ball of the supporting (right) foot, at the same time lowering the right heel, and finish as in the illustration opposite page 18 (count 3). One measure.

Starting again, this time with the weight wholly upon the right foot, and with the left leg extended backward, and the point of the left foot lightly touching the floor, step backward, throwing the weight entirely upon the left foot which sinks to a position flat upon the floor, as shown in the illustration facing page 21, (count 4); carry the right foot quickly backward, and touch with the point as far back as possible upon the line of direction without dividing the weight, at the same time raising the left heel as in the illustration facing page 22, (count 5); and complete the rotation by executing a half-turn to the right, forward, upon the ball of the left foot, simultaneously lowering the left heel, and finishing as in the illustration facing page 24, (count 6).

THE REVERSE

The reverse of the step should be acquired at the same time as the rotation to the right, and it is, therefore, of great importance to alternate from the right to the left rotation from the beginning of the turning exercise. The reverse itself, that is to say, the act of alternating is effected in a single measure without turning (see preparatory exercise, page 13) which may be taken backward by the gentleman and forward by the lady, whenever they have completed a whole turn.

The mechanism of the reverse turn is