economically. A patent was granted to him by the patent office at Washington on 19 December 1833, for "a new and useful improvement in the manufacture of iron and steel by the application of anthracite coal."" Three Lancaster County anthracite furnaces—Shawnee (1844), Chikis- walungo (1845), and Henry Clay

, however, amount of bituminous coal consumed at Safe Harbor Rolling Mill in Convention of Iron Masters, op. cit., Appendix, Table 3. 12. The Columbia Spy, 2 February 1856; George H. Burgess and Miles C. Kennedy, Centennial History of The Pennsylvania Railroad Company: 1846-1946 (Philadelphia, PA.: The