ANTHOPHYLLITE. 



BB like Felspar, except that with carbonate 

 of soda, in every proportion, it yields a 

 white enamel, never a transparent glass. 



Is entirel}' decomposed by muriatic acid. 



Localities. — Iriah. Carlingford Mountain, 

 CO. Down, with Hornblende and. syenite, in 

 greenstone dykes, traversing limestone. — 

 Foreign. — Principally at Vesuvius, among 

 the old lavas of Monte Somma, generally oc- 

 cupying the cavities of chloritic masses, 

 and associated with Ice-spar, Augite, Mica, 

 and Idocrase; Island of Frocida; Faroe 

 Islands ; Java ; the Koucheko-\vskoi Kamen 

 in the Ural. 



Anorthite may be distinguished from all 

 the zeolites, as well as from Nepheline and 

 Leucite, by its infusibility before tiie blow- 

 pipe ; from Topaz by inferior hardness and 

 specific gravity; and from Chr3'solite by 

 lower degrees of specific gravity. Nitric 

 acid has no effect on Chondodrite, while 

 Anorthite is partly dissolved in it; the for- 

 mer, too, is always yellow or brownish- 

 yellow, the latter is invariably white. 



Name From ocvo^Bos, oblique. 



Brit. Mus., Case 30. 



Anorthitic Melane Ore, Haidivger. 

 See Allanite. 



Anorthotomous Felspar, 3Iohs. See 

 Anorthite. 



Anthophyllite, Phillips. A variety of 

 Hornblende (Tremolite) occurring in masses 

 consisting of acicular fibres, which are often 

 disposed in a radiating form. It has a gre\' 

 or clove- brown colour, with an occasiunal 

 blue tinge and a glistening, pearly, pseudo- 

 metaUic lustre. Translucent at the edges. 

 H. 5 to 5-5. S.G. 2-94 to 3-16. 



Comp. Fe Si + MgS Si = protoxide of iron 

 15'5, magnesia 25-9, silica 68-6 = 100. 



Analysis by Thomson, from Perth in Ca- 

 nada E. : 



Silica . 



. 



. 5760 



Alumina 





. 3-20 



Magnesia . 



. 



. 29-30 



Lime . 



. 



. 3-o5 



Protoxide of 



iron 



. 2-10 



Water. 





. 3-55 



99-30. 



BB fusible with great difficulty, alone to a 

 blackish-grey glass ; with borax to a trans- 

 parent glass coloured grass-green by iron. 



Not decomposed by acids. 



Localities. Kongsberg and Snarura, in 

 Norway ; Ujordlesoak, in Greenland ; Had- 

 dam, Connecticut, U. S. 



The name has reference to the resem- 



ANTHR ACONITE. 19 



blance of its colour to that of the flower 

 anthophyllum. 



Brit. Mus., Case 34. 



3L P. G. Horse-shoe Case, 1007. 



Anthosiderite, i9a3ia, Hansmann, Nicol. 

 A mineral resembling Cacoxene, occurring 

 in fine fibrous, flower- like aggregates, of an 

 ochreous-yellow, and yellowish-brown co- 

 lour. Opaque or sliglitly subtranslucent. 

 Lustre ^ilkv. Tough. Gives sparks with 

 steel. H. 6-5. S.G. 3-6. 



Comp. ¥e ^i3 + H = silica 60-4, peroxide of 

 iron 35-6, water 4-0 = 100-0. 

 BB becomes reddish-brown, then black, and 

 fuses with difficulty to a black, magnetic 

 slag. 



Soluble in muriatic acid. 

 Locality. Minas Geraes in Brazil, asso- 

 ciated with Magnetic Iron. . 



Name. From «vfo=-, a jlower, and a-i'^'^'.^c;, 

 iron ; in allusion to its occurrence in fibrous 

 tufts, which are sometimes aggregated into 

 feathery flowers. 

 Brit. Mus., Case 14. 



Anthracite. A non-bituminous variety 

 of Coal, with a bright and often iridescent 

 lustre, and a sharp-edged, shining, con- 

 choidal fracture. H. 2 to 2-5. S.G. I'o to 1-75, 

 The Anthracite of South Wales contains 

 from 88 to 95 per cent, of carbon, 4 to 7 of 

 water, with some earthy impurities. 



Analysis* from Glamorganshire. S.G. 

 1-375 : 



Carbon .... 91*44 

 Hydrogen .... 3-46 

 Nitrogen . . . .0-21 

 Sulphur .... 0-79 

 Ox}gen .... 2-58 

 Ash 1-52 



100-00 



Coke left by the Coal 92-9 per cent. 



This variety of Coal is not easily ignited 

 but when burning it gives out an intense 

 heat, unaccompanied by smoke, and with 

 little flame. It occurs in Carmarthenshire 

 and Pembrokeshire in S. Wales ; Bide- 

 ford in Devon ; Binney Craig, Linlithgow- 

 shire ; Kilkenny, in Ireland; largely in 

 Pennsylvania, U.S., &c. 



Brit. Mus., Case 4. 



M. P. G. Upper Gallery, Wall-case 41, 

 No. 164. 



See also Coal. 



Anthraconite. Limestone, which emits 



* Reporfonthe Coal suited to the Steam Navy, 

 by Sir H. T. De la Beche and Dr. Lyon Play- 

 fair, 



C2 



