The following calculation can thon bo made for this period 



' S.C." - " E " 

 M.T. ' E " 



" S.C." - M.T. 

 S.T. - M.T. 

 "S.C."-- S.T. 



237-00 sec. 



0-144 

 236-856 ,, 

 236-555 



0-301 ,, gaining daily. 



(B) 



The agreement between (A) and (B) is no doubt fortuitous, but, at least, it enables 

 us to say with fair reason that the probable error of the clock rate is not large. 



Temperature. The variations of temperature in the cave were of lesser magnitude 

 than in Series A, the total range being from 26-32 down to 26-99 or only ()-ti C. 

 The maximum rate of variation indicated by the pendulum thermometer is 0-18 C. 

 per hour on Aug. 16th. Thermometer No. 41204 was again used in this series and 

 the same corrections as before applied to the observed readings. 



Barometer and Hygrometer. As in Series A. 



Flexure. Observations for flexure were made only twice once before and once 

 after the swings as follows : 



Nos. 5 and 7. 

 15-OX10- 7 sec. 

 15-1 



No. 21. 



19-3 XlO~ 7 sec. 

 21-6 



means 16XlO~ 7 sec. 



and 



20X10" 7 sec. 



Results. 



In Table XXVII, are given the full results of the observations and, in Table XXVIII, 

 the readings of the individual pendulums are put down in more convenient form. 



TABLE XXVIII. 



