THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE 



AND 



JOURNAL OF SCIENCE. 



♦ ■ 



[FOURTH SERIES.] 



NOVEMBER 1867. 



XLII. Researches in British Mineralogy. 

 By David Forbes, F.R.S. #c* 



IN this present communication it is proposed to lay before the 

 readers of the Philosophical Magazine the first part of a 

 series of researches in British mineralogy which of late have 

 engaged the attention of the author, who, being still occupied in 

 their further prosecution, hopes from time to time to communi- 

 cate in the pages of this Magazine the results of subsequent in- 

 vestigations. 



In these papers it is intended, besides treating of the physical 

 characters and chemical composition of the minerals under con- 

 sideration, to pay especial attention, whenever it is practicable, 

 to the study of their association, paragenesis, and mode of occur- 

 rence, as connected with the petrology and geology of their loca- 

 lities, in order thereby to elucidate as far as possible the origin 

 and formation of the rock-masses or mineral veins in which they 

 may happen to be imbedded. 



As this department of mineralogy has hitherto attracted but 

 little or no attention in England, it is thought necessary, before 

 entering upon the description and particulars of the mineral 

 species which are treated of in the present notice, to devote a 

 few words to the consideration of the present state of British 

 mineralogy, and more especially to bring forward some remarks 

 on the great importance of the application of mineralogical in- 

 vestigation to the study of geological phenomenat. 



* Communicated by the Author. 



t The author would take the opportunity of stating that, although 

 long engaged in mineralogical investigation (many of the results of which 



Phil. Mag. S. 4. Vol. 34. No. 231. Nov. 1867. Z 



