ANIMAL MECHANICS. 



225 



In well formed skeletons the distance from the top of the 

 symphysis to the end of the sternum is ths of the height of 

 the body, so that from the measurement of the height, I 

 could find the length of the chord of the longitudinal arc, 

 whose length was measured directly. 



If 0 denote half the arc subtended by this chord, we have 

 the following equations, to determine p v and p 2 , the radii of 

 longitudinal and transverse curvatures : 



J *7 



chord = — - x height 

 67 5 



arc 



0 



chord sin 0 

 chord 



shTfl = 2pl 



girth 



The measurements made were the following :- 

 Parturient Women. 



(a) 



(?) 





Height. 



Longitudinal 

 Arc. 



Transverse 

 Girth. 



No. r. 



60 in. 



16.8 in. 



39-3 in. 



No. 2. 



63.6 „ 



19.O „ 



3i-2 „ 



No. 3. 



6l -5 » 



16.8 „ 



44-3 » 



No. 4. 



59-8 



15.7 „ 



46.2 



No. 5. 



69.9 „ 



21.8 „ 



39- 6 >, 



From these data, the following table was calculated by means 

 of the foregoing equations : — 

 Q 



