208 REPORT—1840. 
15th. That the suction-influence upon the venous circula- 
tion, attribuied to inspiration by various writers, is well 
founded. 
16th. That the action of the long muscles, and more espe- 
cially those of the abdominal parietes, is attended with an in- 
trinsic sound. The notice of this fact by the Reporter has 
been rendered necessary in consequence of some attempts at 
verification, and some criticisms on an Experiment of the 
London Committee for 1837-38, published in the last edition 
of Dr. Hope’s very valuable work on the Heart. 
17th. That the sounds of the heart, like the motions, are 
governed by the same law in all warm-blooded animals hitherto 
examined, and probably in all kinds whatsoever in which car- 
diac sound occurs, viz. that the first sound in all animals is 
relatively longer and obtuser, and the second shorter and 
sharper ;—that those sounds are, as in the human heart, 
respectively systolic and diastolic; that their causation like- 
wise follows the same law as those of man, the first sound 
being mainly muscular, and the second probably exclusively 
valvular ;—likewise, that there is the same causation and mutual 
relation of the cardiac and arterial pulsations. 
JouHn CLENDINNING, M.D. Oxon. and Edinb., 
Fellow of the Royal College of Physicians, Vice-Pre- 
sident of the Royal Medical and Chirurgical Society, 
and Physician to the St. Marylebone Infirmary. 
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