Comparisons of Magnetic Standards, 1905-14 



229 



Table 7 C. Results of Inclination Comparisons at the Cheltenham Observatory, 1908-1913. 



Series 



Local mean time 



Date 



1908 

 Feb. 4 

 5 

 6 



7 



Inclination obtained 



From 



h m 

 10 42 



8 52 

 14 10 



8 42 



To 



h m 

 U 50 

 10 51 

 15 54 

 10 30 



C. I. w. 



Cheltenham 



+70 31.2 

 30.5 

 31.5 

 30.7 



+70 31.5 

 30.0 

 30.6 

 30.3 



Mean value of (C. I. W. Cheltenham) . 

 II 



+70 30.9 

 30.6 

 33.0 

 33.1 

 31.0 

 30.4 

 30.6 

 31.1 

 32.4 

 32.8 



Mean value of (C. I. W. Cheltenham) . 



III 



Mean value of (C. I. W. Cheltenham) . 



+70 35.8 

 35.9 

 35.3 

 34.6 

 35.9 

 36.4 



IV 



+70 



42.0 

 42.2 

 41.2 

 41.5 

 41.8 

 41.2 

 41.2 

 42.1 

 42.5 

 42.8 

 41.3 

 41.3 

 41.4 



C.I. W.- 

 Cheltenham 



-0.3 

 +0.5 

 +0.9 

 +0.4 



+0.4 



-0.5 

 +0.3 

 -0.1 



+0.4 

 -0.4 









 +0 

 +0 

 +0 



0.0 



-0.3 

 +0.3 

 +0.6 

 -0.4 

 0.0 

 -0.3 



0.0 



+ 1.0 

 0.8 

 0.9 

 1.1 

 1.0 

 0.9 

 1.0 

 1.3 

 1.0 

 0.9 

 1.2 

 1.1 

 0.9 



Mean value of (C. I. W. Cheltenham) . 



+ 1.0 



Remarks 



Dover dip circle No. 177; 

 observer, .J. C Pearson. 



(weight, 0.5) 



C. I. VV. earth inductor 

 ' No. 48; observer, H. 

 W. Fisk. 



(weight, 3.0) 



Dover dip circle No. 177; 

 observer, J. C. Pearson. 



(weight, 1.0) 



C. I. W. earth inductor 

 No. 48; observer, H. 

 M. W. Edmonds. 



(weight, 1.0) 



Hence, we get from the four series, the weighted mean value: C. I. W. Cheltenham = 

 +0'.2 (1908-1913). See footnote on p. 226. 



Assembling the chief results and referring them to I. M. S. (see p. 273), wc obtain: 

 (7) I. M. S.- Cheltenham (Wild-Edelmann declinometer No. 26)= +0'.l (1908-13). 

 (7a) I. M. S.- Cheltenham (Wild-Edelmann magnetometer No. 26)= -O.OOIOI// (1908-13). 

 (74) I. M. S.- Cheltenham (Wild-Edelmann inductor No. 26)= +0'.7 (1908-13). 



NO. 8.-CHRISTCHURCH OBSERVATORY. NEW ZEALAND. 



The comparisons at the Christchurch Observatory, 1906-1908, were carried out at 

 the east and west piers of the absolute house (the east pier is used regularly by the Observa- 

 tory for decUnation and intensity and the west pier for dip), and at several stations in the 

 Observatory inclosure. A careful examination made bj^ the Observatory over the inclosure 

 showed that no measurable station-differences existed. The outside station of 1906 was 

 designated "Peg H" and was 40 feet east-northeast of east pier in absolute house. In 

 December 1907 and January 1908 the outside stations were: "Peg A," 40 feet east-north- 



