2^ IvriNERALOGlCAL SYSTEMS. 



If the principle of this inltrument fliall appear to you dc, 

 ferving ot the public attention, it would give me pleafure to 

 fee it fubmitted to the readers of your excellent Journal. I have 

 the honour to fubfcribe myfelf, 

 Sir, 



Your obedient humble fervant, 



G. B. Greenough. 



VII. 



Outlines of the Mineralogical Syjiems of Borne de Lijle and the 

 Abbe Haul/; uith Obfervaiions. By the Abbe Buee, Com' 

 viunicated by the Hon, Robert Clifford. 



. , To Mr. NICHOLSON. 



SIR, 



Outlines of the W HEN the public mind appears at any time to direft it- 

 mincralogical ^ f^jf towards a particular fcience (as it does at prefent towards 

 de Lifle, and the mineralogy,) no perfon can feel the neceffity of removing any 

 AbbeHauy. erroneous opinions relating to that fcience, more forcibly than 

 a gentleman who dedicates his time, as you do. Sir, to pro- 

 pagate correft fcience by means of your Journal. Aduated 

 by the fame fentiments, may I requeft the infertion of the en- 

 clofed paper, whofe objefl is to remove feveral erroneous 

 opinjons relating to the mineralogical fyftems of Romc^ de 

 L'lfle, andof the Abb(SHauy. It was written by the Abb6 Bu^e 

 in French for a friend of his, but on its being communicated to 

 me by the author, I requefted leave to fend an Englifh tranf- 

 lation of it to you, thinking it might be acceptable to thofe 

 who are fond of philofophical purfuits. Should your opinion 

 coincide with mine, you will certainly afford it a place in one 

 of your enfuing numbers. 



And I remain. Sir, 



Your very humble fervant, 



Robert Clifford. 

 Welbeck'Streef, July 1 3, 1 SOi. 



A Letter 



