350 



ANIMAL MECHANICS. 



act 7 I 



From these data we find, 



K= - 1.024 



ml = + 0.050 

 mX / = + 0.681 ; 



and, finally, the equation of condition (92) becomes 



+ 1.372 X 4 + 1.343 X 3 + 1. 091 X - 0.077 = °- 



The root of this equation, corresponding to the axis of maxi- 

 mum work, is 



X = + 0.07. 



In the preceding cases, and in others which I have cal- 

 culated, too numerous to quote, we find that the generator of 

 the hyperboloid, which constitutes the axis of maximum work, 

 corresponds very closely with the value, 



X = o, 



the geometrical construction of which is shown in Fig. 90. 



It is not difficult to show that, in this case, the entire skew 

 muscle may be mechanically replaced by a single fibre, sup- 

 posed to be endowed with the united force of all the fibres ; 



