RT Journal Article SR Electronic T1 On the limits of hypotheses regarding the properties of the matter composing the interior of the Earth JF American Journal of Science JO Am J Sci FD American Journal of Science SP 461 OP 465 DO 10.2475/ajs.s3-16.96.461 VO s3-16 IS 96 A1 Hennessey, Henry YR 1878 UL http://www.ajsonline.org/content/s3-16/96/461.abstract AB