Few tears at edges and spine else very good. ; On cover are photos of the Trans-Mississippi and International Exsposition. There is a Patent for T. A. Edison for his invention of the Phonograph #609, 268 on page 142. There are also three patents for N. Tesla for Electric Circuit Controller #609, 246, to 609, 249, 609, 251, and patent for Rotary Steam Engine and Traction Engine, Electric Igniter for Gas, #609, 250. (page 142) . Engravings of the "Avion" in its position of flight and with the wings folded invented by M. Ader.; Engravings & Photos; 16pp pages

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