COMPOSITION^ OF SLAGS. 



709 



Table XI. — Jsaays o/s?a(7 —Coutiuuecl. 



Character of specimens. 



External appearance. 



Color of powder. :^^^, Silver. 



Compact; fine-grained, witli thill fracture 



Minute prismatic crystals 



Large lamellar crystals 



Fine, compact, and indistinctly crystalline 



Acicular 



"Vitreous ; large indistinct crystals 



Vitreous ; crystalline ; also compact 



Large distinct laraelliB 



Compact ; fine-grained 



Vitreous; compact ami indistinctly crystalline , 



Vitreous ; large indistinct crystals 



Vitreous; distinct crystals 



Vitreous; indistinct crystals 



Grayish 



Xellow-white . 



Tellow-gray .. 

 Gray-black . , . 

 Tellow-gray .. 



.do . 



Gray-black .. 

 Gray-yellow . 



Blackish 



Grayish 



Gray-yellow . 



... do 



Gray-black . . 



-do . 



Vitreous; compact 



Vitreous ; indistinct crystals . 

 do 



Grayish — 

 Gray-black 



Vitreous; compact and indistinctly crystalline. 



Distinct lamellar crystals 



Indistinctly crystalline and compact 



Very dense, mottled, dull, non-crystalline 



Vitreous ; indist inct crystals 



Crystalline ; looks like hornblende 



Vitreous ; large, indistinct crystals 



Vitreous; indistinctly crystalline and compact . 



Compart : vitreous 



Vitr. ous; indistinct crystals 



Compact ; fine-grained ; dull fracture 



Tellow-gray . 



Brilliant, black. 

 Tellow-gray ... 

 Grayish 



Lu.<^trous; indistinct crystals . 

 Distinct prismatic crystals ... 

 Lustroas ; indistinct crystals . 



Tellow-gray . 

 Gray-black . . 



Gray -white - 

 Gray 



XOTE. — Sipecimens 10 and 17 were specially prepared by Dr. M. W. Des, and specimens C4 and 35 by Mr. A. Eilers. 

 The slag represented by numbers 32. 33. 34, and 35 has been analyzed by Dr. lies (see Analysis XXVIII). 



