TABLE XXIX. 



From Table XXIX, the probable errors of a single observation by any pendulum 



are 



or e 5 = 7-8 XlO" 7 sec. 

 e- = 9-9 



e = g2 



e m = 7-3X10-' sec. 



p s = 3-9X10- 7 sec. 



p. = 4-4 

 p 21 == 4-6 

 p m = 3 -3 XlO- 7 sec. 



The probable error of these results is hardly more than half that calculated from 

 the observations in Series A. 



As before, Tables XXX and XXXI are formed to facilitate the formation of our 

 measure for the accuracy of the observational work. 



TABLE XXX. 



44 



