1880.] Elementary Principles in Animal Mechanics. 361 



V. 



w>=4'25 lbs. 



No. t. 





No. 



t. 



1 133-0 





6 



. 140-0 



2 140-0 





7 



i tCA.A 



. 150 



3 155-0 





8 



. 158-0 



4 137-0 





9 



. 120-0 



5 135-0 





10 



. 122-0 



Mean=139'0 seconds + 2- 7 (mean probable 



error) . 





VI. 









w=3-19 lbs. 







No. i. 





No. 





1 1640 





6 



, 155-0 



2 169-0 





7 , 



-LO / \J 



3 145-0 





8 



160-0 



4 170-0 





9 



. loO'O 



5 170-0 





10 



155-0 



Mean— 158'5 seconds + 2*3 (mean probable 



error). 





VII. 









?0=2*56 lbs. 







No. t. 





No. 



t. 



1 188-0 





6 



. 200-0 



2 198-0 





7 : 



177-0 



3 . 182-0 





8 



, 188-0 



4 182-0 





9 , . . 



195-0 



5 . , 183-0 





10 , 



. 180-0 



Mean=187'3 seconds + 1*7 (mean probable error 





VIII. 









w=0-00 lbs. 







No. 



No. 



t. 



1 , 450-0 





6 



. 350-0 



2 453-0 





7 , 



. 544-0 



3 448-0 





8 



. 510-0 



4 , , , 485-0 





9 



565-0 



5 462-0 





10 



544-0 



Mean = 481 "1 seconds +13'4 (mean probabk 



i error). 



If we convert the mean probable errors, in seconds, of the foregoing 



