Sollte die Elektricität wirklich Wärme verursachen : und sollte diese Wärme eine Wirkung der Zersetzung des Elementarfeuers und Phlogiston's senn? / von Kohlreif
Electric lamp : specification forming part of letters patent no. 223,898, dated January 27, 1880 : application filed November 4, 1879 / Thomas A. Edison, of Menlo Park, New Jersey
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United States Patent Office
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Edison, Thomas A (Thomas Alva) 1847-1931 Search this
Edison, Thomas A (Thomas Alva) 1847-1931 Collection of United States patents granted to Thomas A. Edison, 1869-1884 Search this
Radium, and other radio-active substances polonium, actinium, and thorium, with a consideration of phosphorescent and fluorescent substances, the properites and applications of selenium and the treatment of disease by the ultra-violet light By William J. Hammer