1. BESIDES the motions already spoken of, we have still to consider those that appertain to the Auricles.: 1: Caspar Bauhin and John Riolan, 1 most learned men and skilful anatomists, inform us that from their observations, that if we carefully watch the movements of the heart in the vivisection of an animal, we shall perceive four motions distinct in time and in place, two of which are proper to