Note 48 — THE EXPRESSION OF FEELINGS

This view was held by Haller, Bichat, and Bourgelat and goes back to Galen ("Omnes enim clare cernunt, omnes partes arteriarum eodem distendi tempore," De causis pulsi, book 2, c. 8). The first who saw that the pulse did not appear at the same time in all the parts of the body was Josias Weitbrecht, but his observations were neglected until E. H. Weber actually measured the velocity of the propagation of the pulse wave. (His famous thesis of 1827,—"Pulsum arteriarum non in omnibus arteriis simul, sed in arteriis a corde valde remotis serius quam in corde et in arteriis cordi vicinis fieri.") For the results of other measurements see Tigerstedt: Physiologie des Kreislaufes, p. 385, 1894. Some use of these measurements is made in the present writer's L'Analyse des Sphygmogrammes, which is to appear in the Journal de Physiologie et de Pathologie Générale for May, 1906.