PT - JOURNAL ARTICLE AU - Bigelow, F. H. TI - The Earth a magnetic shell AID - 10.2475/ajs.s3-50.296.81 DP - 1895 Aug 01 TA - American Journal of Science PG - 81--98 VI - s3-50 IP - 296 4099 - http://www.ajsonline.org/content/s3-50/296/81.short 4100 - http://www.ajsonline.org/content/s3-50/296/81.full SO - Am J Sci1895 Aug 01; s3-50