London: Royal Society of London, 1869. Hardcover. First Edition. iv, v, , , 28, -812 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.
J. Norman Lockyer's (1836-1920) paper explaining his discovery of helium in the sun, a discovery that was made 25 years before helium was discovered on earth.
Also contains Thomas Andrews' "The Bakerian Lecture: On the Continuity of the Gaseous and Liquid States of Matter" (pp. 575-590).