236 MESOLIN. 



Analysis, from Skye, by Thomson : 



Silica 40-33 



Alumina .... 29-00 

 Lime ..... 12-12 



Soda 5-33 



Water 13-22 



100-00 



BB fuses with effervescence to a frothy 

 enamel. 



Forms a jelly with muriatic acid. 



Localities. — Scotch.- Tsle of Skye, near 

 Talisker, in white globules, with a radi- 

 ated structure; at Storr, in bluish-white 

 implanted spheres; Portree; Uig, lining 

 cavities, in trap. — Irish. Antrim : Port- 

 rush, in greenstone ; Black Cave, near Larne. 

 Slieve Gallion Cairn, and Milligan, in Lon- 

 dondeny. — Foreign. Faroe Islands, some- 

 times in stalactites three inches long. Disco 

 Island, Greenland, resembling cr^^stallized 

 spermaceti. Skagastrand, in the north of 

 Iceland. Rostanga, in Scania, Sweden. Near 

 the village of Fort George, in the Bay of 

 Fundy. 



Mesole is distinguished from Mesotype 

 by its perfect single cleavage and pearly 

 lustre; from Stilbite or Ileulandite by its 

 higher specific gravity ; and from Apophyl- 

 lite by its crest or fan-like aggregations, 

 which never occur in that mineral. (^Allan''s 

 3Ianual. ) 



In composition Mesole contains one equi- 

 valent less of soda than Mesolite, and stands 

 intermediate between that mineral and 

 Thomsonite. 



Brit. Mus., Case 27. 



Mesolin, Berzelius. See Levyne. 



Mesolite, Heddle. A lime and soda Me- 

 sotype ; occurs in long slender crystals, and 

 massive. Colour dead-white or greyish. 

 Lustre vitreous, never pearly as in Mesole. 

 Pyroelectric. H. 5 to 5-5. S.G. 2-25. 



Comp. (Na, Ca2) 3Si + 3A1, Si + 8H. 

 Anali/sisy from Storr in Skye, by Heddle : 



Silica 4672 



. Alumina .... 26*70 



Lime 8-90 



Soda 5-40 



Water ..... 12-93 



100-65 

 BB becomes opaque and curls up, and 

 finally fuses to a porous and almost opaque 

 globule. 



Localities. — Scotch. Near Edinburgh. 

 Near Kinross. Isle of Skye, at Talisker, 

 Storr, Quirang and Kilmore. — Irish. Giant's 

 Causeway, in fine acicular crystals. Down 



METAXITE. 



Hill, Londonderry. — Foreign. Berufiord, 

 Iceland, in diverging or interlacing crystals, 

 often above two inches in length. Vindhya 

 mountains of Hindostan. Greenland. Bo- 

 hemia. Pargas, in Finland. Nova Scotia, in 

 large masses with Mesole. North Moun- 

 tains of Annapolis. 



Name. From /^itro;, middle, and x/5o?, stone, 

 because it is intermediate between Natrolite^ 

 and Scolezite. 



Brit. Mus., Case 27. 



Mesotype, Phillips. See Natrolite,' 

 Scolezite, Mesolite. 



Mesotype, Haliy. See Stilbite. 



The name is derived from f/'i<ro?, middle, 

 and TV'To;, form ; because the primary form 

 may be regarded as intermediate between 

 those of Analcime and Stilbite. 



Mesotype epointee, Haiiy. See Apo- 



PHI'LLITE, 



Metachlorite, K. List. A Chlorite-like 

 mineral occurring in aggregated crystals like 

 Pennine. Colour dull leek-green. Lustre 

 vitreous to pearlv. Structure foliated-colum- 

 nar. H. 2-5. S.G. 2-64. 



Comp. 4R5 Si + 31i Si + 14H. 





Analysis, by List : 





Silica . 



. 23-77 



Alumina 







. 16-43 



Protoxide of iron 







. 40-36 



Magnesia 







. 3-10 



Lime . 







. 0-74 



Potash . 







. 1-37 



Soda . 







. 0-08 



Water . 







. 13-75 



99-60 

 BB fuses at the edges to a dark enamel. 

 Forms a jelly with muriatic acid. 

 Locality. — Biichenberg, in the Harz. 

 Metastique, Haily. See Dog's-tooth 

 Spar. 



Metaxite, Dufrenoy. Asbestos mixed 

 with Serpentine. 

 Brit. Mus., Case 25. 



Metaxite, Delesse. See Chrysotile. , 

 Analysis, from Reichenstein in Silesia, by 

 Delesse : 



Silica 42-1 



Magnesia .... 41-9 

 Protoxide of iron . . 3-0 

 Alumina .... 0*4 

 Water 13-6 



100-00 



Metaxite, Breithaupt. A fibrous variety 

 of Serpentine, of a greenish-white colour, 



