THOMAS A. EDISON Fine content A.L.S. "Edison", 2 separate pages, 8vo., [n.p., 1924] to Jaffrey P. Buchanan, manager of Edison's Record Disc Division, in dark pencil as was his custom. In part: "...I am sure the explosion is due to sparks. All switches & motors must be moved several feet away from [phono disc] powder. Enclosing them in a box is no good. We killed two men at S[ilver] Lake from pulling switch, spark & one bad explosion from sparks from commutators on motor, but nobody hurt. Edison ". Light, even toning, else very good. Edison's memory was a bit faulty: on March 2, 1903 an explosion at the Edison Portland Cement Company's coal grinding plant at Silver Lake resulted in the death of eight workers, including chief engineer Edward A. Darling.  $600-700