1690 he extended this into a piston engine. In 1705 he used this rudimentary engine to build the world’ s first steamboat. Papin was by this time a professor of mathematics at the University of Marburg, in the German state of Kassel. He decided to steam the boat down the river Fulda to the river Weser. Any boat making this trip was forced to stop at the city of Münden. At that time, river traffic on the Fulda and Weser was the monopoly of a guild of boatmen. Papin must have sensed that there might be trouble. His friend and mentor, the famous German physicist Gottfried Leibniz, wrote to the Elector of Kassel, the head of state, petitioning that Papin should be allowed to“… pass unmolested …” through Kassel. Yet Leibniz’ s petition was rebuffed and he received the curt answer that“ the Electoral Councillors have found serious obstacles in the way of granting the above petition, and, without giving their reasons, have directed me to inform you of their decision, and that in consequence the request is not granted by his Electoral Highness.” Undeterred, Papin decided to make the journey anyway. When his steamer arrived at Münden, the boatmen’ s guild first tried to get a local judge to impound the ship, but was unsuccessful. The boatmen then set upon Papin’ s boat and smashed it and the steam engine to pieces. Papin died a pauper and was buried in an unmarked grave. In Tudor or Stuart England, Papin might have received similar hostile treatment, but this all changed after 1688. Indeed, Papin was intending to sail his boat to London before it was destroyed.
In metallurgy, key contributions were made in the 1780s by Henry Cort, who introduced new techniques for dealing with impurities in iron, allowing for a much better quality wrought iron to be produced. This was critical for the manufacture of machine parts, nails, and tools. The production of vast quantities of wrought iron using Cort’ s techniques was facilitated by the innovations of Abraham Darby and his sons, who pioneered the use of coal to smelt iron beginning in 1709. This process was enhanced in 1762 by the adaptation, by John Smeaton, of water power to operate blowing cylinders in making coke. After this, charcoal vanished from the production of iron, to be replaced by coal, which was much cheaper and more readily available.