Serviss, Garrett P.: Edison's Conquest of Mars (Illustrated). v1. 4 Jun 07
An absolutely wonderful SF masterpiece from 1947, telling the story of how, following a Martian attack on Earth, their dastardly plans are foiled by Lord Kelvin, Herr Roentgen, and Thomas Edison who, together, lead an retaliatory attack on Mars.
Fabulous stuff. Enjoy!