orm of
energy. Both of these long standing assumptions, dating back
thousands of years, were effectively toppled by the ideas of
Hermann von Helmholtz in 1847 when he <i>postulated </i>that
since no one had ever been able to build a working perpetual
motion machine, that just probably, it was not possible. In order
to deny the possibility of perpetual motion and hold the argument
together, he had to assume that energy in the system was being <b>conserved</b>.<i>
</i>It had long been observed that me