Comparisons op Magnetic Standards, 1915-21 



433 



1 All values are referred to station Absolute Observatory; Absolute Observatory = A+0'.3 = B0'M as determined from 

 this series. 



Value by C. I. W. 25 appears in error and is rejected, value given being that determined by No. 5 only. 



Table 9B. Results of Horizontal-Intensity Comparisons at the Honolulu Observatory, 1915. 



' All values are referred to station Absolute Observatory; Absolute Observatory = A + 10.2? = B 8.O7 as determined 

 from this series. 



- Time interval from ending of first half set to beginning of second half set 12 h 20 to 13 h 47 ,u . 



of the Observatory in 1916, some change in the method of observing or in the condition of the 

 magnetometer produced a change of 0'.7 in the resulting values of declination. Consequently 

 since that time a correction of l'.l has been applied instead of the 0'.4 used previous to that 

 time. 



"In the horizontal-intensity comparison observations made by Mr. McComb three deflection 

 distances were used, but it has been considered preferable to use the results only from the two 

 distances used ordinarily in the Observatory work. 



"No satisfactory explanation has been made of the change in the relation of the auxiliary 

 station and the absolute-observatory pier, particularly in the case of horizontal intensity. The 

 stub marking the old station was found in place and, so far as known, no change in the immediate 

 surroundings was made between 1915 and 1921." 



