RT Journal Article SR Electronic T1 On the velocity of transmission of earth waves JF American Journal of Science JO Am J Sci FD American Journal of Science SP 178 OP 184 DO 10.2475/ajs.s3-15.87.178 VO s3-15 IS 87 A1 Abbot, H. L. YR 1878 UL http://www.ajsonline.org/content/s3-15/87/178.abstract AB