This November 1878 letter by Edison is addressed to Joseph Norman Lockyer, a prominent British astronomer whom he had met a few months earlier during a solar eclipse expedition at Rawlins, Wyoming. The letter contains Edison's opinions about newspaper reporters and the future of electric lighting. There are also references to Edison's tasimeter and to Nature, a magazine founded and edited by Lockyer.

Courtesy of the University of Exeter Library. Original is missing; photocopy is courtesy of Professor A. J. Meadows, Loughborough University of Technology, Loughborough, UK.