David Thomas (November 3, 1794 – June 20, 1882) was a native of Wales who was influential in the birth of the Industrial Revolution in the United States. Development of the hot blast David Thomas was born in Cadoxton, near Neath. He went to school at nearby Alltwen and at Neath, and worked on his father's farm before going into the iron industry. He married Elizabeth Hopkins in 1817. As an adult, he was widely regarded as one of the foremost ironmasters in the United Kingdom. It was while employed at the Yniscedwyn Works, in Ystradgynlais in the Swansea Valley, that he devised the process which would advance the Industrial Revolution. On February 5, 1837, Thomas used a hot blast to smelt iron ore and anthracite coal. The result was an easy method to produce anthracite iron, which revolutionized industry in the Swansea Valley. This type of iron had been patented by Edward Martin of Morriston, Wales in 1804. In 1839 he relocated to Pennsylvania, where the owners of the Lehigh Coal and Navigation Company in Lehigh County wanted Thomas to build a furnace for the production of anthracite iron. The Lehigh Valley region, being rich in both anthracite coal and iron ore, was the perfect setting for Thomas's creation. Emigration to Pennsylvania Thomas and his son, Samuel, walked into the infant community of Catasauqua, Pennsylvania, on the Lehigh Coal and Navigation Company's towpath on July 9, 1839. Less than one year later, on July 4, 1840, the first successful anthracite iron furnace in the United States began operation. Thomas's iron works was extremely successful, even though the iron industry in the rest of the Lehigh Valley had begun to decline. The company was incorporated in 1839 as the Lehigh Crane Iron Company, and in 1872 the name was changed to the Crane Iron Company. By that time the community was no longer known as Craneville, but as Catasauqua; Thomas had named both his company and the town in which he founded it after his former employer in Wales. Iron produced at the Crane Iron Company was used in a number of products, many of which were made elsewhere in Catasauqua. The neighbouring company of John Fritz's Iron Foundry used Crane iron to build the first American-made cast-iron construction columns, while the nearby Davies and Thomas Foundry turned Crane iron into pipes and tunnel tubes. Among the still-existing structures which