In Table II, the results are grouped so as to show the variations of the individual 

 pendulums. 



TABLE II. 



Differences from general mean : 



M p 5, 4604X1CT 7 sec. M, 7, 4860XKT 7 sec. 21 M^, 9464X 1CT 7 sec. 



In the above Table, Column B represents the mean of a pair of day and night 

 observations. 



Accuracy of the Results. 



By the use of Column A, Table III is formed. Here v represents the 

 difference from the mean value for each pendulum, and (vv) the square of this 

 difference. 



14 



