The city was saturated in scientists; many had an astonishing breadth of talents. The Minister of Finance just before the upheaval did research on crystals and the spread of animal disease. After it, Paris's first mayor was an astronomer, the general who fought off invaders was a mathematician while Marat, a major figure in the Terror, saw himself as a leading physicist. Paris in the century around 1789 saw the first lightning conductor, the first...