Weighs 7lbs 11 ounces. Came from the boiler room they tore down at St. Mary’s hospital in Knoxville,Tennessee

Here is some borrowed history to share; "The Harbison-Walker Refractories Company (Harbison) was organized in 1865 by J. K. Lemon and originally operated under the name of the Star Fire Brick Company. With a capitalization of $8,000 the venture was financed by ten partners who had no knowledge of brickmaking. The first plant utilized raw materials from clay mines at Bolivar, Pennsylvania, which went into the making of Star brand fireclay brick. In 1875 the original partnership became known as Harbison and Walker, and was later reorganized into the Harbison-Walker Refractories Company in 1902, led by Samuel P. Harbison and Hay Walker. At the outset Samuel Harbison had been hired as company secretary but soon assumed responsibilities for organizing a systematic investigation of fire clays and their suitability for refractory brick uses. Walker was the other remaining original partner and functioned as bookkeeper as well as the person responsible for the study of plant efficiencies and kiln records that chronicled each kiln's reject loss in burning. Between 1909 and 1910 the Harbison-Walker Research Department