SSa SCHIEFER KOHLE. 



At 111° F. melts to a colourless liqviid, re- 

 sembling a fatty oil, which, like it, penetrates 

 paper, and may be removed by heat. On 

 cooling from a melted state, crystallizes in 

 four-sided acicular crj^stals. Distils at 

 194° F. without being decomposed. Inflames 

 easily, and burns completely away, giving 

 out much smoke and a feeble aromatic 

 smell. 



Comp. CH2 = carbon 75, hydrogen 25 = 

 100. 



Insoluble in water, but readily soluble in 

 alcohol, ether, and sulphuric acid. 



Locality. Utznach, near St, Gallen, in 

 Switzerland, in beds of Brown Coal. Den- 

 mark, in peat-mosses. 



Name. After the Swiss Colonel Von 

 Scheerer, by whom it was discovered in 

 1822. 



Brit. Mus., Case 60. 



ScHiEFER KoHLE, BrocJiaiit, Werner. 

 See Slate Coal. 



ScHiEFER Spath, La 3Ietherie. See 

 Slate Spar. 



Schiefekspar, Ph'dUps. } See Slate 



ScHiEFERSPATH, IFemer. § Spar. 



ScHiEFERTHON, Werner. See Slate 

 Clay. 



ScHiLFGLASERZ, Freieskben. Antimonial 

 Sulphide of Silver. See Freieslebp:nite. 



SCHILLER-SPAR, PhUlipS. SCHILLER- 



Spath, Breithaupt. Schillerstein, Wer- 

 ner. Schiller Stone, Jameson. Occurs 

 granular and massive, with cleavage in two 

 directions, one very perfect, the other only 

 appearing in traces. Colour olive-green or 

 pinchbeck-brown. Opaque, but translucent 

 at thin edges. Lustre shining semi-metallic. 

 Yields to the knife. Streak greyish or 

 greenish-white. Rather brittle. Fracture 

 foliated. H. 3-5 to 4. S.G. 2-6 to 2-8. 

 Comp. Hydrated silicate of magnesia, or 



lug bi2 + 3H ; but a large proportion of the 

 magnesia is replaced by the protoxides of 

 iron and manganese, and by lime. 

 Analysis, from Baste, by Kohler : 



Silica 43 08 



Alumina . . . .1-73 

 Protoxide of iron . . . 10-91 

 Magnesia .... 26-16 



Lime 2*75 



Protoxide of manganese . 057 

 Oxide of chrome . * . . 2*37 

 Water 12-43 



100-00 



BE fuses at the thinnest edges. 

 Localities. Baste in the Harz, in com- 



SCHORL. 

 pact Schillerstein, and in Euphotide (Bas- 

 tite) ; also at Radauthal. 



Name. From schillernd, shining, and spath, 

 spar. 



Schiller spar is considered by G. Rose to 

 be an altered Augite. 



Brit. Mus., Cases 25 and 35. 



Schillbrnder Asbest, v. Kohell. See 

 Chrysotile : also Baltimokite and Me- 



TAXITE. 



Schistb Graphique, Haiiy. See Black 

 Chalk. 



ScHiuMA Di Mare. See Meerschaum. 



ScHLACKiGES Erdpech, Werner. See 

 Asphalt. 



ScHMARAGD, Werner. See Emerald. 



SCHMELZSTEIN, Werner. See Dipyre. 



SCHMIERGEL, Werner. See EmerY. 



ScHNEiDERiTE, Meneghini. An opaque- 

 white mineral, occurring in confused laminar 

 radiations in gabbro rosso. H. 3. 



Comp. _ 3(CaMg)3Si2 + Ai3Si*3 + 3H. 



Ayialysis, by Bechi : 



Silica 47-79 



Alumina .... 19-38 



Lime 16-77 



Magnesia . . . .11-03 

 Potash and soda . . .1-62 

 Water 3-41 



100-00 



BB swells up and fuses to a blue enamel. 



Soluble in acids, with the formation of a 

 jelly of silica. 



Locality. Tuscany, with Sloanite, in 

 gabbro rosso. 



Name. In honour of Hen. Schneider, 

 director of the mines of Monte Catini, in 

 Tuscany. 



Schorl, Werner. Schorl, Kinvan. 

 Schorl Noire, Brochant. The name 

 given to black opaque varieties of Tourma- 

 line. 



Fig. 373. 



Fig. 374. 



a::^ 



Fig. 375. 



Comp. (R3 K- B) Si. 



Analysis, from Bovey Tracey, by Ram- 

 melsherg : 



Silica ..... 37-00 

 Alumina . . . .33-09 

 Boracic acid . . . 7-66 



Peroxide of iron . . . 9-33 



