484 



ANIMAL MECHANICS. 



Substituting in equation (143), we obtain, finally, for the 

 constants of the hyperbola, 



0 = 1.323 

 a = 39.2 

 ¥ = 430.58. 



Hence, since the period of the cycle is 



*5 + T -3 2 3 = 16.323, 



we find the Coefficient of Refreshment 



30x2.323 



35.41 x 16.323 



= 0.1206 



Collecting together the results obtained from the walking 

 muscles, and from the muscles of the arms we find 



Coefficient of Refreshment of Voluntary Muscles. 



ft. lbs. per oz. per sec. 



1. Walking Muscles, . .. . 0.13 18 



2. Muscles of Arm (60 sees, rest), 0.1417 



3. „ „ (30 „ ), 0.1296 

 3. „ ,, (15 „ ), 0.1206 



Mean, . . 0.1309 



On comparing the mean Coefficient of Refreshment of the 

 voluntary muscles with the Coefficient of Refreshment of the 

 heart, viz., 0.2377, we see that the heart receives double the 

 refreshment in the same time. This interesting result is 

 quite in accordance with the views of those anatomists who be- 

 lieve that the heart receives double the supply of arterial 

 blood that any other muscle receives, in consequence of the 



