REFRACTIVITY CURVES. 



125 



137 



1.36 



1.35 



n 



1.34 



1.33 , 



L3Z 



Co(N0 3 ) ? 



-c-Co S0 4 



FIG. 36. 



1.0 

 m, 



FIG. 37. 



120 



4-6 8 10 12 14 16 IS 20 



FIG. 38. 



