It was still a question of reading a particular pathological state in the course of its evolution, and of foreseeing its most probable development; thus the simple pectoral pulse is soft, full, dilated; the pulsations are equal, but undulat ing, forming a sort of double wave with an ease, a softness, and a gentle force of oscillation that makes it impossible to confuse this kind of pulse with the others', It is the indication of an evacuation in the chest region.