He popularized mathematics and proposed many ground breaking theories. Born in Trelleck, Monmouthshire, South Wales. David Thomas in 1837 invented a hot blast furnace process to make iron using anthracite coal in Ystradfera (Swansea Valley). transforming the iron-making process there and later in 1839 after re-locating to Pennsylvania where he became the "father" of the American steel industry with his invention. Sir Tudor Thomas Eye surgeon from Swansea. He pioneered ophthalmic corneaplasty in the 1930s. Born in Ystradgynlais 23 May 1893. Philip Vaughan Ironmaster who, in Carmarthen in 1794, patented the first design for a ball bearing. Alfred Russel Wallace Conferred with Darwin (and Darwin with him) regarding evolution of species and acknowledged as theory co-founder by Darwin in his 'On the Origin of Species'. Born Llanbadoc, near Usk, Monmouthshire. Evan Williams Physicist, discoverer of the meson sub-atomic particles. Born Cwmsychpant, Llandysul, Wales. Ernest Willows pioneering aviator. 'The Father of British Airships' Born in Cardiff, 1896. Winston M Thomas Celtic Engineering Inc. Texas telecommunications. (Inventor) vehicle fuel locking device. Born Llanelli References Bibliography List Lists of inventors Inventors Inventors