1880.] Elementary Principles of Animal Mechanics. 



221 



w=975 lbs. (1875-6.) 



t. 



7b. 



"50 sec. 



19 -0 



0-66 „ 



24 -6 



i-oo „ .... 



26 -2 



1-50 „ .... 



23 6 



2-00 „ 



, . 20-0 



3-00 „ 



14-2 



4-00 „ .... 



12 -4 



6-00 ., 



8-5 



From these experiments I found A=50 '7, fi=l'00, t=1 '00 sec. 



w=7 75 lbs. (October, 1876.) 



t 



n. t. 



n. 



t. 



n. 



t. 



n. 



t. 



71. 



sec. 



sec. 





sec. 





sec. 





sec. 





0-50 . 



. 22 0-66 . 



. 42 



075 . 



. 41 



1-0 . 



. 40 



2-0 . 



. 27 



55 



• 25 



40 



55 



48 



55 



. 37 



55 



33 



5 5 



• 23 



44 



55 



50 





. 38 



55 



31 





• 26 



42 



55 



47 



55 



. 40 



55 



33 



55 



• 26 



38 



1 5 



49 



5 5 



. 36 



55 



33 



Mean . 



. 24-4 



41-2 





47-0 





38-2 





31-4 



In discussing these experiments, it will be found that the first 

 must be rejected, as its results differ from all the others. The rate of 

 work was too fast, and the experiment was stopped by respiratory 

 distress rather than by muscular fatigue. 



The other four sets of experiments, when treated as in No. VIII, 

 give the following results : — 



2A' 



1/25 4 "59 per cent. 



1-29 4 33 „ 



1 '30 4-26 „ 



131 4 30 „ 



133 4 53 „ 



1'40 5 13 „ 



Hence we obtain the constants 



A=11375, j8=r30, t=077 sec. 



