116 



ANIMAL MECHANICS. 



Weight 



Flexor dig. long., . . 26.3 per cent. 0.06 oz. av. 

 Flexor hall, long., . . 26 3 ,, . 0.02 „ 



Friction, Sfc, . . . 47.4 



Total, . .100.0 



6. Black Swan. — In this bird the tendons of the two long 

 flexors unite into a common ossified tendon about three-fourths 

 of an inch in length, which distributes tendons to the second, 

 third, and fourth toes. 



Black Swan (long flexors of toes), 



1 . First toe, o per cent 



2. Second toe, .... 23 „ 



3. Third toe, 42 ,, 



4. Fourth toe, • • • • 35 >» 



Total, 



100 



Weight. 



Flexor dig. long., . . 40 per cent. . 0.06 oz. av. 

 Flexor hall, long., . . 24 ,, 0.07 „ 



Friction, 8fc, ... 36 „ 



Total, . . . 100 



Collecting together the preceding observations on the 

 flexor tendons of birds, we find that the tendons distributed 

 to the toes exceed in strength the tendons of the long flexors 

 above the heel by the following quantities : — 



