IN: James Watt (30 January 1736 (19 January 1736 OS) - 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1781, which was fundamental to the changes brought by the Industrial Revolution in both his native Great Britain and the rest of the world. While working as an instrument maker at the University of Glasgow, Watt became interested in the technology of steam engines. He realised that contemporary engine designs wasted a great deal of energy by repeatedly cooling and reheating the cylinder. Watt introduced a design enhancement, the separate condenser, which avoided this waste of energy and radically improved the power, efficiency, and cost-effectiveness of steam engines.

In 1776, the first engines were installed and working in commercial enterprises. These first engines were used to power pumps and produced only reciprocating motion to move the pump rods at the bottom of the shaft. The design was commercially successful, and for the next five years Watt was very busy installing more engines, mostly in Cornwall for pumping water out of mines. These early engines were not manufactured by Boulton and Watt, but were made by others according to drawings made by Watt, who served in the role of consulting engineer. The erection of the engine and its shakedown was supervised by Watt, at first, and then by men in the firm's employ. These were large machines. The first, for example, had a cylinder with a diameter of some 50 inches and an overall height of about 24 feet, and required the construction of a dedicated building to house it. Boulton and Watt charged an annual payment, equal to one third of the value of the coal saved in comparison to a Newcomen engine performing the same work. The field of application for the invention was greatly widened when Boulton urged Watt to convert the reciprocating motion of the piston to produce rotational power for grinding, weaving and milling. Although a crank seemed the obvious solution to the conversion Watt and Boulton were stymied by a patent for this, whose holder, James Pickard, and associates proposed to cross-license the external condenser. Watt adamantly opposed this and they circumvented the patent by their sun and planet gear in 1781. Over the next six years, he made a number of other improvements and modifications to the steam engine. A double acting engine, in which the steam acted alternately on the two sides of the piston was one. He described methods for working the steam "expansively" (i.e., using steam at pressures well above atmospheric). A compound engine, which connected two or more engines was described. Two more patents were granted for these in 1781 and 1782. Numerous other improvements that made for easier manufacture and installation were continually implemented. One of these included the use of the steam indicator which produced an informative plot of the pressure in the cylinder against its volume, which he kept as a trade secret. Another important invention, one which Watt was most proud of, was the parallel motion which was essential in double-acting engines as it produced the straight line motion required for the cylinder rod and pump, from the connected rocking beam, whose end moves in a circular arc. This was patented in 1784. A throttle valve to control the power of the engine, and a centrifugal governor, patented in 1788, to keep it from "running away" were very important. These improvements taken together produced an engine which was up to five times as efficient in its use of fuel as the Newcomen engine. Because of the danger of exploding boilers, which were in a very primitive stage of development, and the ongoing issues with leaks, Watt restricted his use of high pressure steam - all of his engines used steam at near atmospheric pressure.
QUESTION: How did he improve the engines over time?
IN: The Powhatan People (sometimes Powhatans) (also spelled Powatan) are an Indigenous group traditionally from Virginia. In some instances, The Powhatan, may refer to one of the leaders of the people. This is most commonly the case in historical writings by the English. The Powhatans have also been known as Virginia Algonquians, as the Powhatan language is an eastern-Algonquian language also known as Virginia Algonquian.

In November 1609, Captain John Ratcliffe was invited to Orapakes, Powhatan's new capital. After he had sailed up the Pamunkey River to trade there, a fight broke out between the colonists and the Powhatan. All of the English ashore were killed, including Ratcliffe, who was tortured by the women of the tribe. Those aboard the pinnace escaped and told the tale at Jamestown. During that next year, the tribe attacked and killed many Jamestown residents. The residents fought back, but only killed twenty. However, arrival at Jamestown of a new Governor, Thomas West, 3rd Baron De La Warr, (Lord Delaware) in June 1610 signalled the beginning of the First Anglo-Powhatan War. A brief period of peace came only after the capture of Pocahontas, her baptism, and her marriage to tobacco planter John Rolfe in 1614. Within a few years both Powhatan and Pocahontas were dead. Powhatan died in Virginia, but Pocahontas died while in England. Meanwhile, the English settlers continued to encroach on Powhatan territory. After Wahunsunacawh's death, his younger brother, Opitchapam, briefly became chief, followed by their younger brother Opechancanough. In 1622 (Indian massacre of 1622) and 1644 he attacked the English to force them from Powhatan territories. Both these attempts were met with strong reprisals from the English, ultimately resulting in the near destruction of the tribe. The Second Anglo-Powhatan War that followed the 1644 incident ended in 1646, after Royal Governor of Virginia William Berkeley's forces captured Opechancanough, thought to be between 90 and 100 years old. While a prisoner, Opechancanough was killed, shot in the back by a soldier assigned to guard him. He was succeeded as Weroance by Necotowance, and later by Totopotomoi and by his daughter Cockacoeske. The Treaty of 1646 marked the effective dissolution of the united confederacy, as white colonists were granted an exclusive enclave between the York and Blackwater Rivers. This physically separated the Nansemonds, Weyanokes and Appomattox, who retreated southward, from the other Powhatan tribes then occupying the Middle Peninsula and Northern Neck. While the southern frontier demarcated in 1646 was respected for the remainder of the 17th century, the House of Burgesses lifted the northern one on September 1, 1649. Waves of new immigrants quickly flooded the peninsular region, then known as Chickacoan, and restricted the dwindling tribes to lesser tracts of land that became some of the earliest Indian reservations. In 1665, the House of Burgesses passed stringent laws requiring the Powhatan to accept chiefs appointed by the governor. After the Treaty of Albany in 1684, the Powhatan Confederacy all but vanished.
QUESTION:
Are there any other interesting aspects about this article?