London: Royal Society of London, 1884. Three Quarter Leather. First Edition. x, 279 pp.; vii, 281-688 pp. 42 plates. 4to. Recent brown three quarter leather bindings with five raised bands at spine, burgundy title patch with gold embossed titling, gold lines offsetting bands, decorative stamp in each compartment without titling. Numerous folding plates that illustrate articles. Numerous pages throughout volume are brittle with small tears and losses at edges, a large tear at midpoint in the title page of Poynting's article. Pages were trimmed slightly when rebound. The occasional library stamp as it is an ex-library volume, rebound. Very Good.
John Henry Poynting's (1852-1914) paper outlining what would become known as Poynting's Theorem and the Poynting Vector. The theorem is a statement of energy conservation in the electromagnetic field.