46 



ANIMAL MECHANICS. 



1. m. rectus femoris (selected subject), . 

 m. rectus femoris (P.K.), 



Percentage to be added,. . 50.8 



2. m. biceps humeri (selected subject), 

 m. supraspinatus ,, . 



9.2 „ 



6. 1 oz. 



5.42 oz. 



m. biceps humeri (P. K ), 

 m. supraspinatus 



5 9 oz. 

 2.4 » 



8 30Z. 



Percentage to be added, . 53.1 



We may therefore safely assume 50 per cent, to be added 

 to the muscles of a carefully selected subject in order to bring 

 them to the standard of life. 



Hence, 



Total muscles of upper and lower limbs, . 574.62 oz. 



The work done by the muscles of the human body, in ex- 

 ertion that calls into play nearly all the muscles of the body, 

 may be divided into excessive work and ordinary work. The 

 first kind, or excessive work, produces an injurious effect upon 

 the respiratory and circulatory systems, rather than upon the 

 muscles themselves ; so much so, indeed, that death (which 

 sometimes is the consequence of excessive muscular work) is 

 found to be caused, in this kind of over-exertion, by pulmonary 

 apoplexy, or by rupture of an artery, produced by the effort 

 made by the lungs and heart to supply fresh blood to the over- 

 worked muscles. 



Example No. 1. — As a first example of excessive muscular 

 work, I shall take the case of an eight-oared outrigger pro- 

 pelled at the rate of one knot in seven minutes. The mea- 



Add 50 per cent, on ditto, 



. 287.3 



Total, 



861 93 oz. av. 



