London: Royal Society of London, 1850. Hardcover. First Edition. x, -296 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.
Important paper in which Joule refines his calculation on the amount of energy he determined as the "expenditure of a mechanical force represented by the fall of 772 lbs. through the space of one foot." (p.82). He established the mean number at 772.692.
Also contains Michael Faraday's "Experimental Researches in Electricity -- Twenty-Third Series" (pp. 171-188).