364 



ANIMAL MECHANICS. 



Distance between calculated and observed axes = 0.23 in. 



2. Glutceus primus. — This muscle takes its origin from the 

 sacral vertebrae, and is inserted into the outer edge of the fe- 

 mur y below the great trochanter, for a length of 2.90 inches. 

 Its form is shown in Fig. 92, and its fibres are parallel to each 

 other. 



The coefficients L, M y iV, p. 292, are — 



And, since the point 0 has 'moved off to infinity, /+ V may- 

 be regarded as equal to twice the distance of the point of 



