Mechanics Magazine, March 26, 1842;
"Perpetual motion by a drum with one vertical half in mercury, the other in a vacuum; the drum, I suppose, working round forever to find an easy position. Steam to be superceded; steam and electricity convulsions of nature never intended by Providence for the use of man.
The price of the present engines, as old iron, will buy new engines that will work without fuel and at no expense. Guaranteed by the Count de Predaval, the discoverer.
I was to have been a Director, but my name got no further than ink, and not so far as official notification of the honor, partly owing to my having communicated to the Mechanic's Magazine information privately given to me, which gave premature publicity, and knocked up the plan."
Experiments with Perpetual Motion