HERSCHEL, WILLIAM.

A series of observations of the satellites of the Georgian planet, including a passage through the node of their orbits; with an introductory account of the telescopic apparatus that has been used on this occasion; and a final exposition of some calculated particulars deduced from the observations. Read June 8, 1815.

(London, W. Bulmer and Co., 1815). 4to. No wrappers as extracted from "Philosophical Transactions" 1815 - Part II. Pp. 293-362 and 1 engraved plate. Wide-margined, fine and clean.

First appearance of Herschel's second large paper on sattelites. Herschel discovered Uranus in 1781, and this paper is concerned
with the sattelites of Uranus (The Georgiean Planet).

"His two long papers of 1798 and 1815 (the paper offered) were decvoted almost entirely to sattelites. In 1798 he made the astonishing announcement that the motion of the two known satellites of Uranus was retrograde. he also believed, as the result ofnumerous difficult observations, that he had discovered four additional sattelites, but their existence has not been confirmed."(DSB).

Order-nr.: 42390