Anthracite Mohs scale), its higher relative density of 1.3–1.4, and luster, which is often semi-metallic with a mildly brown reflection. It contains a high percentage of fixed carbon and a low percentage of volatile matter. It is also free from included soft or fibrous notches and does not soil the fingers when rubbed. Anthracitization is the transformation of bituminous coal into anthracite. The moisture content of fresh-mined anthracite generally is less than 15 percent. The heat content of anthracite ranges from 22 to 28 million Btu per short ton (26 to 33 MJ/kg) on a moist, mineral-matter-free basis. The heat content
Robert A. Burns Burns leaving a farewell note on his website with a photo of him stretched out in front of a tombstone with his name on it. Robert A. Burns Robert A. Burns (May 27, 1944 - May 31, 2004) was an American art director and production designer who worked on many films including "The Texas Chain saw Massacre", "The Hills Have Eyes", "The Howling", "Re-Animator", and "From Beyond". Burns attended the University of Texas where he was editor of "The Texas Ranger". Burns first entered the film industry as the casting director and art director of Tobe Hooper's 1974 horror film