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
A Star Is Burns Lovitz, the episode guest stars Maurice LaMarche, a regular on "The Critic", who voices George C. Scott as well as Jay Sherman's belch. Phil Hartman also makes a brief appearance as an actor resembling Charlton Heston portraying Judah Ben-Hur in Mr. Burns' film. Rainier Wolfcastle's line, "on closer inspection, these are loafers", was ad-libbed by Dan Castellaneta who was providing the voice of the character on a temporary track. It was later re-recorded by Wolfcastle's normal voice actor, Harry Shearer. The Imperial March from "The Empire Strikes Back" is played as Mr. Burns is introduced. The song the "Rappin' Rabbis"