Note 10 — Chapter I

Although there may be a doubt how far the inventions recorded by Hero were used for superstitious practices, there is no question that, somewhat later, the agency of steam was employed for purposes anything but legitimate. Thus Gibbon (c. xl.) gives an amusing account of how Anthemius, the architect of Sta. Sophia at Constantinople, avenged, himself on Zeno, the orator. “In a lower room,” says he, “Anthemius arranged several vessels or cauldrons of water, each of them covered by the wide bottom of a leathern tube, which rose to a narrow top, and was artificially conveyed among the joints and rafters of the adjacent building. A fire was kindled beneath the cauldron; the steam of the boiling water ascended through the tubes; the house was shaken by the effects of imprisoned air, and its trembling inhabitants might wonder that the city was unconscious of the earthquake they had felt.” Still later, Arago, in his “Éloge de James Watt,” notices an ancient Teutonic god, called Bustarich, on the banks of the Weser, who was made by the priests to show his displeasure through the agency of steam. The head of the metal God was hollow and had within it a pot of water. Its mouth and another hole having been plugged, a charcoal fire was cleverly lighted under it, in such a way as not to be perceived by the expectant worshippers. After a while, the imprisoned steam forced out the plugs, with a loud report, followed by two jets of steam, which formed a dense cloud round the god and concealed him from his astonished worshippers.