COMPOSITION OF SLAGS. 



709 



TABLE XI. Jssays of slag Continued. 



Character of specimens. 



Assays. 



External appearance. 



Color of powder. 



Silver. 



Gold. 



Compact; fine-grained, with dull fracture Grayish 



Slinnte prismatic crystals Yellow-white.. 



Large lamellar crystals Yellow-gray ... 



Fine, compact, and indistinctly crystalline G ray-black 



Acicalar Yellow-gray . . . 



Vitreous large indistinct crystals do 



Vitreons crystalline ; also compact Gray-bkck 



Large distinct lamella) Gray-yellow ... 



Compact fine-grained Blackish 



Vitreous compact and indistinctly crystalline Grayish 



Vitreous large indistinct crystals Gray-yellow . . . 



Vitreons distinct crystals do 



Vitreous indistinct crystals . Gray-black 



do .. do 



Vitreons compact Grayish 



Vitreons indistinct crystals Gray-black 



do do 



Vitreous compact and indistinctly crystalline Yellow-gray... 



Distinct lamellar crystals do 



Indistinctly crystalline and compact do 



Very dense, mottled, dull, non-crystalline do 



Vitreous indistinct crystals do 



Crystalline; looks like hornblende do 



Vitreous large, indistinct crystals do 



Vitreons indistinctly crystalline and compact do 



Compact vitreons Brilliant, black. 



Vitrious indistinct crystals : Yellow-gray ... 



Compact fine-grained; dull fracture I Grayish 



do do 



do Yellow-gray 



do Gray -black .... 



Lustrous; indistinct crystals do 



Distinct prismatic crystals Gray-white 



Lustrous; indistinct crystals Gray 



do ' do ... 



1 

 1 

 2 

 1 

 1 



124 

 1 

 2 

 3 

 1 

 1 

 1 

 1 

 2 

 1 

 1 

 2 

 2 

 2 

 1 

 1 

 1 

 2 

 3 

 1 

 1 

 1 

 1 

 1 

 1 

 9 

 8 

 1 

 1 



Ozi. to ton. 



1.8569 



0.95 



0.73 



0. 070818 



0.70 



6. 17347 



4.101 



0.6 



4. 919332 



2.24 



5. 084606 



4.2 



4.6 



2.87 



3.87 



2.615 



2.515 



1.85 



2.8 



1.4 

 10.05 



3.98 



4.44 



6.22 



2.78 



1.72 



4. 52 



0. 554151 



0.5833 



1.639 



0.92 



1.47 



0.60 



0.15 



0.36 



Ozi. to ton. 

 Faint trace. 



Do. 

 None. 

 Faint trace. 

 None. 

 Trace. 



Do. 

 Faint trace. 



Do. 



Do. 



Do. 

 None. 



Do. 



Do. 



aii 1 1 trace. 

 Trace. 



Do. 



Do. 



0.005 19 



Trace. 



Do. 

 None. 



Do. 

 Trace. 



Do. 

 None. 

 Trace. 

 Faint trace. 

 None. 

 Faint trace. 

 None. 



Do. 



Do. 



Do. 



Do. 



NOTE. Specimens 10 and 17 were specially prepared by Dr. M. W. lies, and specimens 34 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). 



