Paris: Gauthier-Villars, 1890. Wraps. First Edition. 1172 pp. 4to. Wear and cuffing to original light salmon colored wraps. Original paper label pasted to spine with Volume # and year handwritten in black ink. Clean within, most pages uncut. Text in French. Housed in custom protective chemise with gold embossed titling to spine. Very Good.
Edouard Branly (1844-1940) demonstrates the first sensitive device for detecting radio waves, later named the "coherer."