70 ANIMAL MECHANICS 



Similar experiments made on the gastrocnemius and solceus 

 gave them 



5.Q kilograms per sq. centimeter. 



Koster has recently published (in the Nederlandsch Archie/ 

 voor Genees en Natuurhunde) an account of similar experi- 

 ments, from which he deduces, from the gastrocnemius and 



1 1.6 kilograms per centimeter, 

 which number he afterwards reduces to 



9.5 kilograms per centimeter. 



The preceding observations, collected together, give us 

 the following results : — 



1. Flexors of arm, . . 8.991 kilos, per centr. (Henke). 



2. „ „ • • 8.187 99 



Mean, . . 8.589 



1. Extensors of foot, . 5.90 kilos, per centr. (Henke) 



2. ,, . . 11.60 „ (Koster). 



Mean, . . 8.75 



My own results, converted into French measures, are, 

 Flexors of arm, . . 6.67 kilos, per centimeter. 

 Flexors of leg, ... 7.78 „ ,, 



Mean, . . 7.225 



The mean of all the observations made by Henke and Koster, 

 on the muscles of the arm and foot, gives — 



Coefficient of) . 

 contraction { = 8 669 kil. per centr. = 123.04 lbs. per sq. m. 



