Comparisons of Magnetic Standards, 1905-14 



221 



The observations, September 19-21, by L. A. Bauer, were maiiilj' for the purpose of 

 testing the new, small universal magnetometer (No. 14) constructed by the Department of 

 Terrestrial Magnetism. They were incidental to his vi.sit to the Observatory. In the 

 absence of simultaneous observations, the Observatory values are the standardized 

 magnetograph ones. 



The data supplied by the Observatorj'^ are given in Table 3 A and the results of compar- 

 isons in Tables 3B, 3C, and 3D. 



Table 3C. Results of Horizontal-Intensity Comparisons at the Alibag Obseroatory, 1911. 



'Weight 0.5 as this value is dependent partly upon observations when Sun slione on instrument, making temperature- 

 corrections uncertain. 



Table 3D. Results of Inclination Comparisons at the Alibag Observatory, 1911. 



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

 (3) I. M. S.- Alibag (Cooke magnetometer No. 7)= +0'.3 (191 1). 

 (3a) I. M. S.- Alibag (Cooke magnetometer No. 7) =- 0.00 1 08// (1911). 

 Ob) I. M. S.- Alibag (Cambridge dip circle No. 160)= -CM (191 1). 



