History of anthracite coal mining in Pennsylvania History of anthracite coal mining in Pennsylvania There are two types of coal found in Pennsylvania: anthracite (the “hard coal” found in Northeastern Pennsylvania below the Allegheny Ridge southwest to Harrisburg; also called “stone coal”, “rock coal” in the 1800s) and bituminous (“soft coal”, found west of the Allegheny Front escarpment). Anthracite coal is a natural mineral with a high carbon and energy content that gives off light and heat (produced energy) when burned, making it useful as a fuel. It was possibly first used in Pennsylvania as a fuel in 1769, but its real history begins with a documented
A Star Is Burns play in the opening moments of the episode is a parody of "U Can't Touch This" by MC Hammer. The opening of Bart's film "The Eternal Struggle" is a reference to The Amazing Criswell's narration in "Plan 9 from Outer Space". Barney's film contains references to "Koyaanisqatsi", and the music of the film, which was composed by Philip Glass. Barney's film also features musical selections from the aria "Un bel di vedremo" from Act II, pt. 1 of Puccini's opera "Madama Butterfly". In its original broadcast, "A Star Is Burns" finished 57th in the ratings for the week of February