and Shepard 1 s Treatise on Mineralogy. 349 



• 





Brooke, (the expurgation of chemistry in this case, is quite in- 

 complete,) kraurite for green iron ore, Selbite for carbonate of sil- 

 ver, Beresofite for red lead ore or chromate of lead, Carinthite for 

 yellow lead ore or molybdate of lead, &c. We think an author 

 who feels compelled in justice to Count Bournon, to revive the 

 obsolete trivial name of fibrolite and substitute it for the well es- 

 tablished and universal Bucholzite, should hesitate before rejecting 

 other original and unexceptionable terms for the mere "sake of 

 uniformity." 



A glance at the list of species will enable us to show how the 

 principles adopted by the author work in practice. If the science 

 of chemistry had never been heard of, we think this list might 

 have been somewhat shorter even than now. 



Qnincite. This earthy hydrous silicate of magnesia is here re- 

 tained as a species, although even on chemical grounds it is hardly 

 distinct from Meerschaum. 



Lincolnite. This species, which was proposed by Prof. Hitch- 

 cock, has been generally considered as only Heulandite. Mr. Al- 

 ger has written a very satisfactory paper on this subject in Vol. 

 xlvi, p. 235, this Journal ; the specimens on which Mr. Alger's 

 opinion was founded and which were measured by Mr. Tesche- 

 niacher with the reflecting goniometer, were received from Prof. 

 Hitchcock himself, and others were obtained from the State collec- 

 tion, where they were deposited by Prof. H. Mr. Shepard cannot 

 object to this conclusion, founded solely on crystaliographic char- 

 acters. 



Fibrolite. Under this name Prof. Shepard includes the species 



^ 



Bucholzite and Sillimanite. We 



xlvi 



Mr 



viously proposed,) but the crystaliographic evidence for their sepa- 

 ration is as good as in the case of Arragonite and calcareous spar. 

 Prof. Shepard says, (p. 138,) " The American Bucholzites belong 

 to Sillimanite ; nor have we any valid ground for maintaining Sil- 

 limanite distinct from fibrolite," &c. As the question must be 

 decided, as far as it concerns our author, on purely natural his- 

 tory grounds, without regard to any chemical evidence, (however 

 cogent that may seem to others,) we would only say, that until 



form 



Vol. xlvii, No. 2.— July-Sept. 1844 



45 



