Well known even to social dancers, as the basis of the polka-step, is the _pas bourrée_. This requires the dancer to stand on the front foot while the back one is raised. In the first movement the back foot is brought into the third position on the toes. The second movement is the beating of the front foot, and third movement the beating of back and front feet. To this step belongs the _pas de bourrée emboîté_, which requires the advancing of the right foot to the fourth position, the toe pointed and the knee straight, the bringing up of the left foot to the fourth position with the toe pointed behind the right, and the advancing of the right foot with the toe pointed to the fourth position without any raising or sinking of the body; it is all performed on the toes. Quite acrobatic in character are the celebrated _pirouettes_--movements composed of a _demi-coupé_ and two steps on the points of the toes. The _pirouette_ starts by bringing one foot to the fifth position behind, the toe touching the heel, then raising both heels and turning on the toe, reversing the position of the feet, and revolving on the toe. A _pirouette_ used in the old dances consists of a turn on one foot and the raising of the heel of the other, stepping with the toe of this foot four times and so getting around the other one. In some of the slow _pirouettes_ the movement seems to consist of the raising of the foot and jumping round as in some of the country dances. To this class belongs the _fouetté_, which gives a fluid, swinging impression. Of ancient French origin is the _pas de basque_, which starts in the fifth position with the bringing of the right foot forward with pointed toe, and passing in a semi-circle to the second position with the weight on the right foot, then with a _glissade_ through the third position into the fourth. The _glissade_ is a slide. Slide the front foot from the third position with pointed toe slightly raised to the right; then bring the left toe to the right heel, and _vice versa_. The first movement is the sliding of the foot from the third to the second position; the second, the left foot is drawn into the third position forward and repeats.