Paris: Georges Carré et C. Naud, 1897. First edition. 8vo., iv, 165, 29 pp.,  adversts, 1 double-page plate in color, 3 in b&w. Publisher's red cloth, titled in gilt on the spine and upper cover; modereate wear and fading. Library stamp and number on the title page. A near very good copy. Item #53493
Includes a lengthy chapter on Röntgen rays. Roosens and Salu No. 8633.