MOVEMENT OF THE BLOOD IN THE ARTERIES. 



341 



second in the carotid of man, 1 and at 2.} inches per second in the mctatarsal 

 artery. Chauveau, 2 with a similar hut somewhat improved instrument, esti- 

 mated the rapidity of the blood in the carotid of the Horse at 20. '2S inches 



Km. 140. 





Volkmann's Hfemodromometer. 



per second during the systole of the heart, falling to 8.78 inches during the 

 diastole. Volkmanu found the rapidity of the current in the jugular vein 



FIG. 147. 



FIG. 148. 



Hjematochometi r i>f Yierordt : 

 a and 6, mouthpieces. 



. Lortet's Instrument. 



of the dog to be 9 inches per second, and Ludwig and Dogiel 3 found it to 

 vary in the carotid of the rabbit from 4 inches to 9 inches, and in the carotid 

 of the dog from 14 to nearly 30 inches, in the second. Cyon and Steinmann 



1 Physiologic, p. 110, 1861. 



2 Archiv. Gen. de Med., vol. i, 1861, p. 113 ; and Jour, de la Phys., 1800, p. 695. 



3 Ludwig's Arbeiten, 1867, p. 196; see also Notes on some Experiments on the rate 

 of flow of Blood, and some other liquids, through Tubes of Narrow Diameter, by Drs. 

 Duncan and Gamgee, Journ. of Anat. and Phys., vol. v, 1871, p. 150 ; and Cyon and 

 Steinmann, Bull, de 1'Acad. Imperiale de St. Petersbourg, t. viii, p. 55. 



