The Air Loom had been constructed by the Jacobins in Paris around the time of their coup d'etat in 1793. Just as they had corrupted the ideals of the Enlightenment to their despotic ends, so had they corrupted Enlightenment science. The secret of its power was pneumatic chemistry, the science of the invisible elements known as 'airs' or 'gases,' which had been developed by some of the great geniuses who had inspired the revolution.