RT Journal Article SR Electronic T1 On celestial dynamics JF American Journal of Science JO Am J Sci FD American Journal of Science SP 239 OP 243 DO 10.2475/ajs.s2-38.113.239 VO s2-38 IS 113 A1 Mayer, J. R. YR 1864 UL http://www.ajsonline.org/content/s2-38/113/239.abstract AB