LIST OF WORKS ON GEOLOGY, &C. 65 



Spars, or Crystals found in the Cornish Mines, called Cornish 

 Diamonds. Phil. Trans., vol. xlvi, (No, 493), p. 250. 



8. Heath, R. A Natural and Historical Account of the 

 Islands of Scilly, and a General Account of Cornwall, %vo. Lond. 



1754. 



9. BORLASE, Rev. W. An Account of the great Alterations 

 which the Islands of Sylley have undergone since the Time of the 

 Ancients, who mention them, as to their Number, Extent, and 

 Position. Phil. Trans., vol. xlviii, p. 55. 



1756. 



10. BoRLASE, Rev. W. Observations on the Ancient and 

 Present State of the Islands of Scilly. 4/o. Oxon. 



1758. 



11. BoRLASE, Rev. W. The Natural History of Cornwall. 

 Fol. Oxon. 



12. An Account of some Trees discovered under- 

 ground on the Shore at Mount's-bay, in Cornwall. Phil. Trans., 

 vol. 1, p. 51. 



13. Da Costa, E. M. An Account of the Impressions of 

 Plants on the Slates of Coals [refers to cross-loads of Cornwall]. 

 Ibid, p. 228. 



1767. 



14. Borlase, Rev. W. Extract from Two Letters [Native 

 Tin]. Phil. Trans., vol. Ivi, pp. 36, 305. 



1770. 



15. Borlase, Rev. Dr. W. and H. Rosewarne. Letters 

 giving an Account of a Specimen of Native Tin found in Cornwall. 

 Phil. Trans., vol. lix, p. 47. 



1778. 



16. Pryce, W. Mineralogia Cornubiensis, a Treatise on 

 Minerals, Mines and Mining. Fol. Lond. See also long notice in 

 Journ. des Mines, t. i. No. 3, p. 91, with "Additions tiroes des 

 Joarnaux Allemands," p. 1181. 



