MODE II. ANTHRACITE. 553 



terms. It must not at the same time be for- 

 gotten, that Pliny uses the word anthracites, in 

 a very different sense, for a gem which has the 

 effulgence of burning coal. 



" Coaly Plombagine. Anthracolite. 



cc This kind of plombagine has recently been Bom's 

 discovered at Schemniz, in Hungary, which dif- 

 fers from the known plombagine, as being very 

 light, compact, brittle, of a shining and con- 

 choidal fracture, and without soiling the fingers 

 is easily broken. It has but very little iron in 

 its mixture, and therefore when calcined under 

 a muffle, slowly dissipates, and loses 90 parts of 

 its weight. According to the analysis, lately 

 made at Schemniz, in Hungary, in 100 parts 

 there are 90 of carbon, 5 of argil, 3 of iron, and 

 2 of silex. 



cc It seems to have some affinity with the in- 

 combustible pit-coal, described by M. de Mor- 

 veau in the new Memoirs of the Academy of 

 Dijon. Prem. Semest. 1783, page 7686. 



" Mr. Struve has just given the description 

 and analysis of a fossil, which, with the excep- 

 tion of the colour, still more agrees with this 

 variety of plombagine. He calls it also coaly 

 plombagine. See Journal de Physique, 1790, 

 January, p. 55. 



" Black compact coaly plombagine, with 



