London: Royal Society of London, 1881. Hardcover. First Edition. v, , -1092 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.
George Darwin’s (1845-1912) theory of the formation of the moon along with his age calculations.