Series D, Cape Evans 



Calculated and Observed Values of C. 



0-30 C. 0-31 C. 



0-13 0-13 



0-03 0-03 



-0-10 -0-09 



0-26 0-2G 



0-26 0-27 



0-08 0-09 



-0-02 -0-02 



0-14 0-14 



0-11 0-12 



0-18 0-18 



Table LXVI gives the temperatures of observation at the various stations together 

 with the change of temperature dO during the 40 minutes the pendulum was under 

 observation. The lag correction is then calculated from the lag constant of 25 X 10~ 7 sec 

 per degree Cent, per hour. Only in the case of Christchurch, 1910, is the lag correction 

 appreciable, since the first two sets of observations at Cape Evans have to be neglected 



in any case. 



TABLE LXVI. 



82 



