354 



ANIMAL MECHANICS. 



2. "Master Magrath" — Adductor secundus (j3). — In the 

 case of the celebrated Irish Greyhound we have 



2C = 1.68 in., 20 = 6g° oo', 



2.(J) - + 0.349. s(^) = + 2 .686, 



corresponding to three fibres : from these data we find, as 

 before, 



L , L> 



p=o.u6, — = 0.895, 



P , 2.8224 



^~ = , i = 0.38 m., 



P = 3.29 in., U = 2.95 in. 



On laying down these points upon the pelvis and femur, I 

 found — 



Distance of 0 from centre of socket = 1.95 in. 

 Distance of 0' from centre of socket = 2.28 ,, 



Difference, . . 0.23 in. 



Here the point 0 lies inside the origin of the muscle, but the 

 point O' lies completely outside the insertion of the muscle, 

 at a distance of 1. 19 in. nearer to the hip joint than the upper 

 extremity of the line of insertion ; — and the equivalent fibre 

 00' is shorter than any real fibre of the skew muscle. 



3. Woman — Adductor secundus (j3). — In this case we 

 have 



2c = 3.60 in., 2(f> - 7o°.oo / , 



S («-) = o, l8l S g> + ,5a 7 , 



corresponding to three fibres : from these data, we find, as 

 before, 



