POISEUILLE, (JEAN LÉONARD MARIE). - THE CIRCULATION OF THE BLOOD.

Recherches sur les causes du mouvement du sang dans les vaisseaux capillaires.

(Paris, Bachelier), 1835. 4to. No wrappers. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences", Tome 1, Séance Lundi 28 Decembre. Pp. (521-) 574. (Entire issue offered). Poiseuille's paper: pp. 554-560. Disbound. Some scattered brownspots.

First printing of one of Poiseuille's first research-papers concerning blood flow, leading to his announcement of the law named after him, the law of the flow of liquids in tubes in 1839.

"Poiseuille’s name is permanently associated with the physiology of the circulation of blood through the arteries. Hales was the first to measure the blood pressure by allowing the blood to rise into a vertical glass tube. Poiseuille improved the experiment by using a mercury manometer instead of the long tube and by filling potassium carbonate into the connection to the artery in order to prevent coagulation. With this instrument, a hemodynamometer, he showed in his 1828 dissertation, "Recherehes sur la force du coeur aortique," that the blood pressure rises and falls on expiration and inspiration. He also found that the dilatation of an artery at each heartbeat was about 1/23 of normal. Ludwig improved the instrument by adding a float, which he caused to write on a rotating drum."(DSB).

Order-nr.: 49108