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Special Reports 



Table 9C. Results of Inclination Comparisons at the Honolulu Observatory, 1915. 



All values are referred to station Absolute Observatory; Absolute Observatory =A 0'.6 as determined from this series. 



The observations were made as nearly simultaneous as possible. Mr. H. E. McComb, 

 observer-in-charge at the Observatory, carried out all the observations with the U. S. 

 C. & G. S. instruments, and Messrs. Johnston and Grummann, under the direction of 

 Captain J. P. Ault of the Carnegie, those with the C.I.W. instruments. C. & G. S. 

 galvanometer was used for all inside earth-inductor observations and C. I. W. galvano- 

 meter for all outside observations. 



Table 9D. Results of Declination Comparisons at Honolulu Observatory, 19S1. 



'All values are referred to station Absolute Observatory; Absolute Observatory = A 0' .0 (see foot-note 2). 



The observations with C. & G. S. No. 36 at Absolute Observatory appear to be defective judging from the base-line 

 values, and the Observatory values have therefore been derived from the magnetograph, using a mean base-line value, 

 927'.6, which depends upon other observations with No. 36 corrected by l'.l. The base-line values from C.I. W. No. 

 5 come out the same for both stations and the station-difference between Absnhite Observatory and A is therefore assumed 

 to be zero for declination. 



