TAB. XXIII, 



FERRUM sulplmratum, 



Sulphate of Iron. 



Class 3, Metals. Ord. 1. Homogeneous. 

 Gen. 7. Iron. Spec. 6. Sulphate of Iron, 



Dip. 1. Crystallized. 



Spec. Char. Sulphuric acid combined with iron P 

 Syn. Vitriol martial. De Lisle, v. 1. 331* 



Sulfate de fer. De Bom, v. 2. 39. 



Vitriol vert. Dauhenton, 28. 



Vitriol of iron. Kiriv. v. 2. 20. 



Fer sulfate. Haily, v. 4. 1 22, 



Vitriolum martis. Linn. Syst. ed. 12. v. 3. 104, 



G keen vitriol, as it is commonly called, is found crystal* 

 lized, stalactitical, or in amorphous lumps, in many parts 

 of Great Britain. The present is a curious specimen from 

 Hawkshead coal mine, near Glasgow. It appears by a note 

 sent to Mr. Vansittart with this and some other specimens 

 which I had the pleasure of receiving from the Rev. 

 Dr. Beeke, that the mine had been worked for above 200 

 years, from the crop to the dip (as the colliers term it), that 

 t is, following the descent from where it appeared on the 

 surface, always working at the lowest part, Thus the upper 

 parts, or pits, first worked were necessarily kept free from 



