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Special Reports 



Table 11A. Results of Declination Comparisons at the Loanda Observatory, 1920. 



' It is assumed that there is no station-difference between stations B and C. 

 Table 11B. Results of Inclination Comparisons at the Loanda Observatory, 1920. 



From the above we have: 



(II) I. M. S.-Loanda (Elliott magnetometer No. 200) = +2'.2 (1920). 

 (11a) I. M. S.-Loanda (Dip circle No. 115, needle I) = +-4'.6 (1920). 



NO. 12. LUKIAPANG OBSERVATORY, CHINA. 



The comparisons during October 31 to November 3, 1917, at the Lukiapang 

 Observatory were obtained by Observer F. Brown upon the conclusion of his expedition 

 in the provinces of southeast China. The stations used for the comparisons of 1911 

 were reoccupied. The stations for D and H observations were the "Elliott Pillar" 

 (D a ) in the absolute house (D), and "Edmunds Pillar" (F) in the grounds about 18 

 meters southwest of D a . The same mark was used at both stations, viz, an arrange- 

 ment of black and white triangles painted on bronze sheet on granite slab in the south 

 wall of the compound; the azimuth of this mark as supplied by Reverend J. de Moidrey, 

 Director of the Magnetic Observatory, from station D a is 3 47'. 1 west of south (previous 

 to 1915 the value 3 47'.0 was used, but further determinations have yielded the above 

 value which is now used), and from station F 357 08'.4 west of south. As in the com- 

 parisons of 1911 it was not possible to move the Observatory earth-inductor so as to 

 afford an exchange of stations and the C. I. W. dip-circle was mounted on the pillar b, 

 designated D b) one meter north of pillar c, designated D c , on which the Observatory 

 earth-inductor No. 12 is mounted. 



