4n6 



WTCHTISITE. 



found at Pewabie Mine, Houghton co., 

 Michigan. Also a mile from the Cliff Mine, 

 at the Albion location, 3 to 4 inches wide. 



Name. After Professor J, D. Whitney. 



For variet}^ see Darwinitb. 



WrcHTlslTE, Hausmann. WiCHTYNE, 

 Laurent. IMassive, with traces of cleavage 

 parallel to the sides of a nearly rectangular 

 rhombic prism. Colour black. Lustre dull. 

 Fracture angular or flat-conchoidal. H. 

 scratches glass. S.G. 3 '03. 



Comp. (R5 + ii) Si2, or (Na, Ca, Mg, Fe)^ 



Si2 + (Al Fe) bi2. 





Analysis, by Laurent : 





Silica . . . . 



. 5G-3 



Alumina 



. 13-3 



Peroxide of iron . 



. 4-0 



Protoxide of ii'on . 



. 13-0 



Lime . . , . 



. 6-0 



Soda . . . . 



. 3-5 



Magnesia 



. 3-0 



99-1 



BB forms a black globule: with borax 

 fuses to a bottle-green glass. 



Isot attacked by muriatic acid. 



Locality. Wichtis*, in Finland. 



Brit. Mus., Case 33. 



WiESENERZ, Werner. Meadow ore. See 

 Bog Ikon -ore. 



Wild Lead. A Cornish Miner's name 

 for Blende. 



Wilhelmite. Willemtte, Levy, Dana. 

 Willeljiine, Phillips, Beudant. Willemit, 

 V. Lennhard. Wilijamite, Nicol. WiL- 

 LiAMsiTE. Hexagonal : primary form an 

 obtuse rhombohedron. Occurs in regular 

 six-sided prisms. Also in grains or massive. 

 Colour white, yellow, red or reddish-brown. 

 Transparent to opaque. Lustre vitreo- 

 resinous. Streak white. Brittle. Fracture 

 conchoidal. H. 5-5. S.G. 3-89 to 4-18, 



Fig. 456. 



Fig. 457. 



"^^i^ 



Comp. Anhj'drous silicate of zinc, or Zn^ 



tti = silica 27-15, oxide of zinc 72-85 = 100. 



Analysis, from Stirling, by Vanuxem ^ 

 Keating : 



Oxide of zinc . . . 68-06 



* Whence the name Wichtisite. 



WILSONITE. 



Silica 25-44 



Peroxides of iron and man- 

 ganese . . . . 6"50 



101-00 



BB decrepitates and becomes opaque, but 

 fuses only at the edges to a white enamel. 



In a powdered state, easily forms a jelly 

 in concentrated muriatic acid. 



Localities. Vieille Montague, near Aix- 

 la-Chapelle. Moresnet, near Liege. Raibel. 

 Stirling Hill, New Jersey. 



Name. After Wilhelni L (Willem), King 

 of the Netherlands, 



Brit. Mus., Case 26. 



WiLLD Lead. See Wild Lead. 



WiLLiAMSiTE, Shepard. A variety of 

 Serpentine. Occurs in irregularly-shaped 

 seams, sometimes above an inch thick 

 between Chrome Iron-ore and Serpentine. 

 Massive. Structure lamellar. Colour apple- 

 green. Lustre feebly shining, pearly to 

 resinous. Surface very dull. Translucent. 

 Streak white. Fracture even. H. 4-5. S.G. 

 2-59 to 2-64. 



Comp. 3Mg Si + Al Si + 3H. 

 Analysis, from Pennsylvania, by Smith §° 

 Brush : 



Silica 41-60 



Alumina « ' . , . trace 

 Magnesia . . . .41-11 

 Protoxide of iron . . . 3-24 

 Protoxide of nickel , . 0-50 

 W^ater . . . . . 12 70 



99-15 



BB phosphoresces, turns white, and 

 hai'dens so as to scratch glass, but does not 

 fuse ; dissolves with difficulty in borax. 



In powder dissolves slowly in hot muriatic 

 acid. 



Localities. West Chester, Pennsylvania, 

 U. S. Also of a pale green colour at 

 Haroldswick, in Unst, one of the Shetlands, 

 with chrotnate of iron. 



Name. After the discoverer, L. White 

 Williams, of West Chester, Pennsylvania. 



Brit. Mus., Case 34. 



W^iLSONiTE, T. S, Hunt. A mineral 

 bearing some resemblance to Scapolite. Oc- 

 curs massive, with a cleavage in two direc- 

 tions, at right angles to each other. Colour 

 rose-red to peach-blossom-red. Subtrans- 

 lucent. Lustre vitreous ; occasionally pearly 

 on cleavage - surfaces. Fracture uneven. 

 H. 3-5. S.G. 2-765 to 2-776. 



Analysis, by T. S. Hunt: 

 Silica . , . . , 43-55 



