230 MR HAIDINGEB on the Sulphato-tri-Carbonate of Lead. 



stances, had excluded the forms of Axotomous Lead-bary te from 

 the Rhombohedral System, previous to their correct determina^ 

 tion, and even in contradiction to the opinions entertained by 

 crystallographers. The preceding demonstration, that they are 

 Hemiprismatic, reconciles the results of both sciences. 



