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Special Reports 



The horizontal-intensity results for the Observatory were computed by the method 

 explained in the report of Director Claxton for the year 1912. 



It was not possible to make all the comparison observations in declination and in- 

 clination simultaneously, since the urgency of other work restricted the available time 

 of the Observatory staff. It was necessary, therefore, to obtain the comparisons in 

 declination and inclination partly, as indicated in Tables 8A and 8C, by the less satis- 

 factory method of alternate observations. The order of the alternate observations was 

 made such that the mean times for each instrument for each individual correction on 

 standard were practically the same; thus each determination of difference on standard 

 by the method of alternate observations is based upon 2 complete determinations with 

 the one instrument preceded and followed by a complete determination with the other 

 instrument. 



1 All values are referred to station .4; .4 = 5 + 4'. 7. 

 Table 8B. Results of Horizontal-Intensity Comparisons at the Hongkong Observatory, 1915. 



1 All values are referred to A; A = B 29.1 y. 



' Half set; weight 0.5. 



" Report of the Director of the Royal Observatory, Hongkong, for the year 1912, p. 2, Hongkong, 1913. 



