New York: Van Nostrand. First. hardcover. Frontispiece, 7 plates, and other in-text illustrations. 86 pages. Slim 8vo, original gilt-lettered dark blue cloth. New York: Van Nostrand, 1903. First edition. A very good(+) bright copy. very good(+).
Hammer (1858-1934), Chief Engineer with Edison, first suggested and used radium for cancer and tumor treatment. In addition he invented luminous radium preparations used for watch dials, clocks, etc. His work preceded Mme. Curie's Recherches sur les substances radioactives by a year.