300 CELESTINp AND BARYTO-CE LESTINE OF CLIFTON. 



other as those which I examined^ and I think that this difference 

 in composition is of much interest. 



The occurrence of bqryto-celestine in the British Isles has, I 

 believe^ not been observed previously, and that it occurs here is a 

 fact which I thought of sufficient interest to bring before the 

 Physical and Chemical Section, as it adds a new species to the 

 hitherto discovered Clifton minerals. 



