RT Journal Article SR Electronic T1 Distribution and secular variation of terrestrial magnetism; No. III JF American Journal of Science JO Am J Sci FD American Journal of Science SP 314 OP 325 DO 10.2475/ajs.s3-50.298.314 VO s3-50 IS 298 A1 L. A. Bauer YR 1895 UL http://www.ajsonline.org/content/s3-50/298/314.abstract AB