The second and last part of a chapter from this fascinating forgotten work Oddities: A Book of Unexplained Facts (Allan, London 1928) by R.T. Gould. Gould was a polymath who appears to have tolerated fools and cranks gladly...however Johann Bessler was no fool (although he may have been insane) and no less a figure than the philosopher Leibniz and and the scientist and Newtonian Willem Jacob 's Gravesande thought he had the secret of perpetual motion. Gould gets to the heart of the matter -as always with footnotes blazing...
Was Orffyreus honestly deceived when he wrote down such an incorrect description (for so we must regard it)† of his own mechanism? The thing is unlikely–but it is possible, as a later case has sufficiently shown.
† The supposition that the wheel was kept going by external power does not, of course, exclude the possibility that it also contained "overbalancing" mechanism. If well made, this would waste very little power, though it could not generate any: and it would certainly impress an amateur mechanic like the Landgrave–the only man who ever saw it.