The Motions produced by the Jonctures of the Shoulders, are mostly simple; that is, the Arm directed by them, is usually carried either upwards or downwards, backwards or forwards. Though these Motions may be said to be infinite; yet in Effect, does the Arm in describing a Circle on the Wall, show all the Motions it is capable of. For every continued Quantity being divisible in infinitum, and this Circle being a continued Quantity produced by the Motion of the Arm around its Circumference, it follows of Course, that the Motions of the Shoulders are infinite.