WORKS ON MINERALOGY. 



4. OUTLINES of an Attempt to establish a Knowledge of EX- 

 TRANEOUS FOSSILS on Scientific Principles. By WILLIAM MAR- 

 TIN, F.L.S. &c. In Octavo, 85. in boards. 



a. SPECIMENS of BRITISH MINERALS, selected from the Cabi- 

 net of PHILIP RASHLEIGH, Esq. of Menabilly, F.R.S. and F.A.S. 

 With general Descriptions of each Article. In two parts quarto, 

 with coloured Engraving, price Four Guineas in boards. 



6. BRITISH MINERALOGY, in Coloured Figures with Descriptions 

 from the Primitive Crystals to their Amorphous States. By 

 JAMES SOWERBY. No. 1 to 68. royal 8vo. I3l. 5s. Od. To be con- 

 tinued in Numbers published every other month, price 5s. each. 



7. By the same Author. EXOTIC MINERALOGY, or Coloured 

 Figures of Foreign Minerals, as a Supplement to British Mineralogy. 

 Nos. l, 2, 3. 15s. To be continued every other month inFive-shil- 

 ling Numbers. 





