410 WOLFRAM BLANC. 



Paris, as a mordant in dyeing, and is the 

 best known substance for rendering ladies' 

 dresses incombustible. 



At Kaptenberg, in Stjn-ia, Tungsten is 

 used for hardening steel. Knife-blades made 

 with an alloy composed of from 2 to 5 per 

 cent, of Tungsten added to the steel, are 

 said to retain their edge four times longer 

 than those made with common iron. An 

 alloy formed of 80 per cent, of steel and 20 

 per cent, of tungsten possesses a degree of 

 hardness which has never yet been obtained 

 in the manufacture of steel. See also Aike- 



NITE. 



Wolfram Blanc. See Scheelite. 



WOLFRAMBLEIERZ. See SCHEELETINE. 



WoLFRAMiNE, Greg §■ Lettsom, Dana. 

 Cubical. Occurs in cubes ; also pulverulent 

 and earthy. Colour yellow or yellowish- 

 green. Opaque. Dull. 



Comp. Pure tungstic acid, or \V' = tung- 

 sten 79-3, oxygen 20-7 = 100. 



BB on charcoal, infusible ; but becomes 

 blackish-blue and then black in the inner 

 flame. 



Localities. — English. Cornwall ; Drake- 

 walls tin-mine, Huels Friendship and Pol- 

 dice, investing Wolfram. Brandygill, Cum- 

 berland, with Wolfram and Scheelite. — 

 Foreign. St. Leonard, near Limoges, in 

 France. U. S. : Cabarras co., N. Carolina ; 

 Huntington, in a quartz vein with Wol- 

 fram. 



WoLFRABiocHER, Hausmaim. See Wol- 



FRAMINE. 



WoLFSBERGiTE, i\^ico/. Rhombic. Occurs 

 in small aggregated tabular prisms, usually 

 broken at the ends ; also massive, and dis- 

 seminated, and fine-granular. Colour lead- 

 grey to iron-black, sometimes with an irides- 

 cent tarnish. Opaque. Lustre metallic. 

 Streak black. Fracture conchoidal to 

 uneven. H. 3-5. S.G. 4-748. 



Comp. -C-u S + Sb2 S3 = copper 24-9, sul- 

 phur 24-9, antimony 50-2 = 100. 



Analysis, by H. Rose : 



Sulphur .... 26-34 



Copper 24-46 



Antimony .... 46-81 



Iron 1*39 



Lead , . . . . 0-56 



99-56 



BB decrepitates and fuses readily; on 

 charcoal gives oif fumes of antimony, and 

 with soda, after long fusion, yields a globule 

 of copper. 



WOLNYNE. 



Localiiif. Wolfsberg*, in the Harz, im- 

 bedded in Quartz, and generally covered 

 with a coating of Pyrites. 



WoLLASTONlTE, Dana, jS'icol, Haily, 

 Hausmann, Haidinger. Chemically, Wol- 

 lastonite is a Pyroxene with a lime base, 

 but differing altogether from it in form, and 

 optical properties. 



Oblique : primary form a rhombic prism. 

 Occurs rarely in distinct tabular prisms; 

 mostly in broad prismatic or laminar masses. 

 Colour white, inclining to yellow, green, 

 red, or brown. Translucent. Lustre vitre- 

 ous, inclining to pearly on cleavage-faces. 

 Streak white. Rather brittle. Sometimes 

 very tough. Fracture uneven. Becomes 

 phosphorescent by heat or when scratched 

 with a knife. H. 4-5 to 5. S.G. 2-78 to 2*9. 



Fig. 466. 



Comp. Silicate of lime, or Ca^ Si'^ = silica 

 52, lime 48 = 100. 



Analysis, from Capo di Bove, by v. Kohell : 



Silica 51-50 



Lime 45'45 



Magnesia .... 0-55 

 Water 2-00 



99-50 



BB fuses with difficulty to a semi-trans- 

 parent glass. 



Decomposed perfectly by muriatic acid, 

 either before or after ignition, with separa- 

 tion of gelatinous silica. 



Localities. — Scotch. Glengairn, Aber- 

 deenshire, with Idocrase. — Dish. Dunmore 

 Head, co. Down, massive, and with a confus- 

 edly fibrous texture. — Foreign. Capo di Bove, 

 near Rome, of a greenish-white colour, in 

 lava ; also in ejected blocks from Vesuvius. 

 Cziklowa and Dognatska, in the Bannat of 

 Temeswar. Pargas, Porhoniesni, Skrabbole, 

 in Finland. Kongsberg, in Norway. Cey- 

 lon. Grenville, Canada. Cliff Mine, Lake 

 Superior. United States, at Willtiborough, 

 New York, and at Lewis, south of Keese- 

 ville. 



Name. In compliment to Dr. Wollaston. 



Brit. Mus., Case 25. 



^VoLNYNE. The name by which a variety 

 of Sulphate of Baryta, found at Muzsay, in 

 Hungary, was once known on the continent. 



* Whence the name Wolfsbergite. 



