No. 50.J 



87 



The specimens from 12 - 14 are from near Pittsburgh, Penn. ; 

 and those from 1 5 - 20 are from the Kanawha salines : they are 

 nearly alilie in the character of their impurities. They are made 

 hj artificial heat, and from weak brines. 



ANALYSES. 





Chloride 



of 

 sodium. 



Chloride 



of 

 calcium. 



Chloride 

 of m ig- 

 nesium. 



Water. 



12. Salt from Sawmill run, near Pittsburgh, 



13. Salt from Orr's works, do 



14. Salt from Petersons works, do 



89.77 

 96.70 

 95.93 

 91.31 

 8^.39 

 86.65 

 87.00 

 8) 62 

 82.75 



1.78 

 0.53 

 0.74 

 1.26 

 1.48 

 1,48 

 2.14 

 2.68 

 3.68 



0.55 

 0.07 

 0.13 

 0.43 

 0.43 

 0.47 

 0.66 

 0.72 

 1.67 



7.90 



2.70 



3.20 



7.00 



9.70 



11.40 



10.30 



10.10 



11. 90 



16. Salt No. 2, do 



17. Salt No. 3, do 



18. Salt No. 4, do 



19. Salt No. 5, do 



20. Salt No. 6, do 





The specimens from 21 - 25 inclusive are from Saltville near 

 Abingdon, Washington county ( Va.). These are'remarkably pure 

 specimens of salt : they are all made by artificial heat. 



ANALYSES. 





Chloride 



of 

 sodium. 



Sulphate 



of 



lime. 



Sulphate 



of 

 magnesia 



Water. 



21 Salt No 2, Saltville 



98.45 

 99.01 

 99.18 

 99.11 

 98.61 



0.95 

 0.20 

 0.27 

 0.68 

 1.02 



0.20 

 0.09 

 0.05 

 0.11 

 27 



0.40 

 0.70 

 0.60 

 0.10 

 10 



22. Salt No. 4, do 



23 Salt No 6 do 



24- Sal t No 7 do 



9i Suit No fi do 









The specimens from 26-35 were made from the brine at North- 

 wichj Cheshire, England : 38 and 39 are made from British rock 

 salt dissolved in sea- water ; 37 and 38 are from the brine at Wins- 

 ford, Cheshire, Eng. ; 40 is from brine at Droitwich, Worcester- 

 shire, Eng. ; 43 to 46 are from British rock salt dissolved in fresh 

 water. They are all made by artificial heat. 



