ANIMAL MECHANICS. 3(>9 



Lion — Ghitceus secundus (j3) 



Angle. 



I — V 



I cos 9 



V cos 0 



o° 



3-9* 



6.78 in. 



3 . 09 in. 



IO 



5-54 v 



8 26 „ 



2-74 » 



20 



8. 14 „ 



*°-95 „ 



2 -72 „ 



30 



8.58 „ 



u.72 „ 



2.41 „ 



From these measurements we obtain — 



Angle. 



1 



(&')- 





0.2558 



2 .5243 



10 



0. 1805 



1.9856 



20 



0. 1228 



1.6793 



30 



0.1015 



J- 5359 



Sum, 



0-6606 



7-7251 



and lastly, 



* = ^77^ = 5-85 in - 

 0.6606 J J 



The axis LM is drawn at this distance from the vertex O, 

 and ST is drawn through the observed socket. 



Distance between calculated and observed axes = 0.21 in. 



6. Glutceus tertius. — This muscle takes its origin from the 

 whole of the lower third of the outer surface of the ilium, and 

 2 B 



