From Rockets, Missiles, and Men in Space by Willey Ley, 1968 edition, pp. 80-81:
Guncotton [...] had been discovered [in 1845] by German chemist Christian Friedrich Schönbein, who had tried to dissolve cotton in a mixture of nitric and sulfuric acids. Of course, the cotton had refused to dissolve and Schönbein, writing off the experiment as a failure, had gone home for supper, after putting the still wet strands on top of the hot stove to dry. Schönbein lost his laboratory, but discovered guncotton in the process.
I occasionally take on work as an expert witness in software patent cases.
Additionally, in 2007 I sold enough of my photographs to qualify as a professional photographer. My specialty is panoramic, high-dynamic-range landscapes.