t'ol-LK 'TKJNS IN ECONOMIC CJEOMXJY AND METALLUROV. 219 



; •!{ El' A li HP a h-A PIl ITE. 



(1) Coarse |«)\v(lrr. (.MdT.'i. ) 



(2) For criu'ililivs, coar.si*. (r»lti()H. ) 



(3) For criicilili'8. !iin>. Varii-s in asli JVoin '.\A\'A-^ to I X<V> [nr nMit. (r>lf.07.) 



(4) For iiiakii);^ stovo poli.sli. (;">l(i'wJO. ) 



(r>) For lul)ricatiiij5, contains 7. til'i pi'r cKiit. asli. (^Hilo.) 



(<)) For oloctrotypt'rs u8o, contains IT-O-'i percent, ash. ('iKUl.) 



(7) For ntakinjr ))onfil3, contains r>.l i;{ to 17.«)82 per cent. ash. (fiHJl'i. ) 



(H) Paint stock, contains 10. 7:{7 per cent. ash. (^IGlf).) 



(IM For powder antl shot fjlazinj^, contains 10.7:?7 percent, ash. (^Itil;*.) 



(10) For {^huw-m.-ikcrs. (r)'.1(:i;i. ) 



(11) Foun(h>rs facings. (.VJGll.) 

 (l-J) HattiTs stock. (.'>%!(;.) 

 (ll{) For organ bnilders. (.V.Xin.) 

 (14) For piano makers. (u'JGH.) 



MlNVFACTriiEh CHA I'UITE. 



(1) .Stove polish, in cakes. (jMUOy.) 

 ('J) Leatl pencils. (r)l01l.> 



I (l{) Carpenters pencils. (.')1010. ) 

 ORUOIBLES. 



(1) Brass. No. r>U. (51003.) 



(•>) Hrass. No. 40. (5ir.9tJ.) 



(;{) Brass. No. :{0. (51.VJ7.) 



(4) Brass. No. 25. (ol5U8.) 



(.'.) Brass. No. 20. (.51590.) 



(G) Brass. No. 10. (51600.) 



(7) Brass. No. 6. (51007.) 



(8) Brjws. No. 1. (51601.) 



(9) Steel. No. 40. (51004.) 



TESTED CRUCIBLES. 



(1) 1.50 pounds crncibli', used for twenty-six heats by the Birmingham Patent Tube 

 Company. (51(.>06. ) 



(2) 120 pounds crucible, used for thirty-six heats of wire metal at Waterloo Works. 

 Birmingham, England. (5ir>0:?.) 



(3) 60 pounds crucible, used for twenty-two heats at the Cambridge ."^teel Works, 

 Birmingham, England. (51601.) 



(4) 50 pounds cmcible, used for forty-eight heats of brass at the Winlield Works, 

 Birmingham, England. (51(105. ) 



C < ) .\ li S E |{ I E S 



('oAL. 



Composition : Varioii.s liy<lroc;irl)ons, with possibly free (carbon, roiii- 

 l»iK't iiml iiiii.s.sivf, with little or no .stiiicture excej)! banding,' and a 

 Jointed fraetiue. 



It varirs in hardness from (».."> to L'.."), and in speiMlic •gravity from 1 to 

 1.8. I.s black to brown in color, and varies from (lull to siibmetallic in 

 bister. It breaks with a more or less conchoidal fracture, and is pen- 

 (•rally brittle. When lieat<'d cv.dves <;as, or tarry matters, or both. It 

 is infusible, but many varitics soften ()n beinj^ heated and an' moie or 

 less decomposed. 



Coal occurs jus a refj^ular uiemlurol the rock series intiTst rail lied with 



