136 



CORRECTIONS to be Applied to Observations with Circle No. 27 to Reduce them to Christchurch 



Observatory Standard. 



In other words, the south Inclination shown by Circle No. 27 was in excess of Christchurch Observatory 

 standard by 0'-68 for Needle No. 1 and l'-95 for Needle No. 2. These values for instrumental 

 differences are confirmed by the results of the observations at the Absolute Hut, Winter Quarters. 



In ten cases out of thirteen the result of observation with Needle No. 2 is in excess of that with Needle 

 No. 1. The mean value of the differences between the needles in all thirteen cases gives the result that 

 observations with Needle No. 2 are in excess of those with Needle No. 1 by l' - 2, which is in fair accord 

 with the difference as determined from the comparative observations, viz., 1' 3. 



The observations at the Ice Station and during the sledge journeys are not so consistent, but in view of 

 the better conditions for observing, which in all probability prevailed at the Absolute Hut, it seems 

 reasonable to attach greater importance to results obtained at this station than to those at out-stations 

 under varying conditions. 



TABLE II. Absolute Inclination Results. (See fig. 3, opposite.) 



* In the case of the observations of July 23, 1902, the mean time of observation for each needle has been obtained by 

 applying the mean of the differences in time between other observations to the mean time of these two observations. 

 No comparisons are available to reduce for instrumental differences the results obtained witli Needles Nos. 3 and 5. 



