372 



ANIMAL MECHANICS. 



tertius. Its origin AB 9 and insertion A'B', are shown in 

 Fig. 97. On dividing the angle AOB into three equal parts, 

 1 found the following results : — 



Lion — Glutceus fortius. 



Angle. 



l-V 



I cos 9 



1' cos 0 



o°. oo' 



3. 17 in- 



4.47 in. 



1.37 in. 



7 . 20 



3.20 ,, 



4-7° » 



1.50 „ 



14.40 



3-33 » 



4 95 j 5 



1.62 „ 



22.00 



3-73 » 



5-21 „ 



1.65 



From these measurements we obtain — 



Angle. 



I -I' 



l + l' . 



1 — v cos 



o° 00' 



o-3i55 



1 . 8423 



7. 20 



0.3125 



1.9375 



14.40 



0. 3003 



1-9730 



22. 00 



0. 2681 



I. 8391 



Sum, 



1.1964 



7.5919 



Hence we find 



7-59I9 

 1. 1964 



3.17 in. 



Laying down this line LM, and drawing ST through the 

 socket S, we find 



Distance between calculated and observed axes =0.19 in. 



