A bonus

A bonus

Von Kempelen’s shock was justified — the allowance the empress handed him was equal to his current salary, and would be renewed every year. Or so he hoped.

Over the next several years, von Kempelen went on to complete all the tasks that the Empress set out for him — fountains at both Schönbrunn and Pressburg Castle, a pontoon bridge across the Danube, and later, two steam engines, one of which he used to dig canals. He got a patent for them a year ahead of Watt, but lacked the money to refine his designs. This led to some rather dire consequences; Standage mentions an account stating that one of Kempelen’s steam engines exploded while in use.