DEPARTMENT OF TERRESTRIAL MAGNETISM. 



259 



Tabi-e 2. — Preliminary results of ocean magnetic observations on the Carnegie from San Francisco 

 to Easter Island and Buenos Aires, November 1916 to March 1917} 



Obsenera: J. P. Ault, commanding the Carnegie: H. M. W. Edmonds, B. Jones, A. D. Power, L. L. Tanguy, 



and N. Meisenhelter. 



*For previous ocean results (1905-1916), see Carnegie Inst. Wash. Publication 175 (Vol. Ill), pp. 97-104, 

 261-295. 



^Declination and inclination charts used for comparison : British Admiralty Charts Nos. 3775, 3776, and 

 3777 for 1917, and No. 3598 for 1907; Reich's Marine-Amt Charts, Tit. xiv. No. 2, for 1910, Tit. xiv, No. 2a, 

 for 1905; U. S. Hydrographic Office Chart No. 2406 for 1915. 



'Horizontal-intensity charts used for comparison: British Admiralty Chart No. 3603 for 1907; Reich's 

 Marine-Amt Chart, Tit. xiv, No. 26 for 1905; U. S. Hydrographic Office Chart No. 1701 for 1900. 



*Units of third decimal c. g. s. 



