Trans. Roy. Dubl. Soe., Ser. H., Vol. VII. Pruare XXI. 
i 
Chromium Nitrate 
at 16° 
Cr(NO3)2°9H20. 
A yiolet- coloured 
salt. 
2 
The same, at 100°. 
The colour has 
changed to green. 
3. 
Chromium sulphate, 
at 20°. 
Cr23(SO04): 15H20. 
A blue or violet salt, 
40° 
yielding a deep 
blue solution. 
4, 
The same, at 100°. 
The colour has 
changed to green. 
Solution vf Cobalt Chloride in Glycerine at different The spectra of solutions of Chromium Salts at 
temperatures. different temperatures. 
