With acknowledgement and grateful thanks to Scott Ellis of Besslerwheel forum:-
"In 1847, a 26-year-old German medical doctor, Hermann Helmholtz, gave a presentation to the Physical Society of Berlin that would change the course of history. He presented the original formulation of what is now known as the First Law of Thermodynamics, beginning with the axiomatic statement that a Perpetual Motion Machine is impossible.
Axiom - A statement or proposition that is accepted as true without proof.
No one had ever succeeded, he wrote, in building a Perpetual Motion Machine that worked. Therefore, such machines must be impossible. If they are impossible it must be because of some natural law preventing their construction. This law, he said, could only be the Conservation of Energy.
But a profound reversal of reasoning has occurred in the last century. Helmholtz originally said "Because a Perpetual Motion Machine is impossible, therefore the First Law of Thermodynamics;" while in any physics text book today one will find the statement that "Because of the First Law of Thermodynamics, a Perpetual Motion Machine is impossible."
Skeptics are quick to cite the Laws of Thermodynamics to disprove Bessler's claims. In fact, the argument is circular.
The Laws of Thermodynamics do not prove that Bessler's machine is impossible. On the contrary, they are deduced from the "leap of faith" of first presuming it is impossible."
It is often found that people who are recognised for their expertise in one field often comment on areas outside their experience and because of their celebrity their ideas are accepted.
Of course in this case the expert was a 26 year old medical student. Others such as Lord Kelvin in 1895 stated that “heavier-than-air flying machines are impossible” .
Lord Kelvin could not know , what would happen in the future, and apparently, Hermann von Helmholtz didn’t even know what had happened in the past.
I was callow and thin of skin, when first I found Orffyreus' spin;
the poisonous barbs of jeers and sneers aimed at me by my erstwhile peers
did not a jot of difference make, to my intention to forsake
those oft repeated laws of old that we were vehemently sold -
immutable and set in stone. I, ignorant, set out alone
to prove that falsehoods once proposed, accepted almost unopposed,
weaved in argument assumptive, circular and quite presumptive,
conclusions made were not conclusive and some agreed were too inclusive.
For 40 years I've sought success, wanting more than just a guess.
Helmholtz said non-stop rotation, driven just by weights in motion,
had never ever been achieved, and not by Bessler, who deceived.
The works of many witnesses dismissed as so much witlessness,
by Helmholtz, who said that he had proved no weight-driven wheel had ever moved
without the aid of trickery, chicanery and quackery.
Addressing such a case as this a court of law might well dismiss
on grounds of lack of evidence when set against such testaments,
the leap of faith required to prove, that gravity wheels could never move.
I must apologise for inflicting my poetry on you from time to time, but I enjoy writing it and so I publish it sometimes. I have many more but I am content to leave it as it is.