An Explanation of the Observed Irregularities in the Motion of Uranus on the Hypothesis of Disturbances Caused by a More Distant Planet; with a determination of the mass, orbit, and position of the disturbing body. Offprint from the Appendix of the Nautical Almanac for the Year 1851.
London: W. Clowes & Sons, 1846. 8vo (232 x 146 mm).  4-31  pp. Original printed self-wrappers as issued, stitched, pages partially unopened and uncut. Very little age-toned, faint offsetting on title-page. A clean, crisp and completely unsophisticated copy. ----
Dibner 16; Sparrow 1; Norman 7; Evans 24; DSB..... More