London: Royal Society of London, 1850. Hardcover. First Edition. vii, -844, 13 pp. 4to. Library binding, tan leather spine with gold embossed titling. Interiors clean, ex-library stamp on title page, and occurring sporadically within. Numerous folding plates that illustrate articles. Pages were trimmed slightly when rebound. Very Good.
Also contains William Parson's (1800-1867) paper that first identifies the spiral nebulae,"Observations on the Nebulae" pp. 499-514 and cataloged separately as our inventory #27507.