Prof. B. Silliman, Jr., on some American Minerals. 383 



vesting the corundum. 



The beautiful foliae of this pearly white mineral have suggest- 

 ed the name Euphyllite, as an appropriate designation for the 

 species, while the name Corundellite has the same obvious deriva- 

 tion as Emerylite, the mineral described by Dr. Smith. 



There is a similar mineral associated with the blue corundum 

 of North Carolina, which was made known to mineralogists by 

 Hon. T. L. Clingman, M. C, from North Carolina. It occurs in- 

 Color faint olive brown. Lustre vitreous 

 to pearly, like mica. In cleavable plates apparently hexagonal. 

 Cleavage perfect, laminae separable. H. 3. G. 2-94 to 3-008. 

 Brittle, transparent, not acted on by strong acids. B. B. whitens, 

 gives a brilliant light, but does not fuse, unless with great diffi- 

 culty on the edges. It contains a trace of fluorine, and a quali- 

 tative analysis detected in it silica, alumina, lime, soda and water. 

 An insufficient quantity of the mineral prevented a perfect analy- 

 sis being made. So far as its constituents have been obtained, it 

 contains silica 36369, alumina 42-373, lime 10-141, magnesia 

 4*462, water 1-448, the difference soda and loss. Soda about 

 4 per cent. 



Should it appear on repeating the analysis of this mineral, that 

 it is new as the present would appear to indicate, I would pro- 

 pose to adopt the name Clingmanite, suggested by Prof. Shepard, 

 in honor of the distinguished gentleman before named, who has 

 shown great interest in advancing the study of mineralogy* 



The following tabular arrangement will make the constitution 

 of these species of easy comparison. 



Si 



30- 



l.Emerylite of Smith, ., 



2 - " Pennsylvania, 3350 



3. Margarite, '31 260 



4. Corundellite, !35*708 



5. Euphyllite, 39042 



6. Clingmanite 1 36369 



• • t 



A! 



50- 



58- 



51199 



53131 



51-378 



42373 



Ca 



Mg 



Na 



* • 



13' 



7-50 0005* 

 9-239 0-283 2969 



k 'h&fi 



:> 



7*271 



3-1931-088 



10*141 4-462 





m* k* *J v • • • • 



0-4131-224 



0-871 



• • 



5276 

 2303 

 4-593 

 1-448 



The formulas 

 given yielded 

 on calculation. 



31-91 

 30-51 

 36-31 

 3902 



3447 



53-30 

 150-92 

 53-87 



52-10 



5755 



a -fFe 0-42 and Mn 00 



• • • 



4 



Total. 



10000 

 9950 



100- 



100-068 



100-165 

 94-783 





100 

 100 

 100 



100 

 100 



* Prof . 

 determined 



this 



At 



- -^ to give it the above name, nnen "« wunu, »»*<»., .-_ - — 



gaged on this n-ries of minerals, he promptly abandoned the invention 

 that time we both thought that the Emerylite of Dr. Smith would probably include 

 all the American species herein described, which now appears not to be the fact On 

 Somg to England in June, Prof. S. left me a memorandum containing his notes on 

 fre North Carolina mineral, and I have embodied them in the above description 



own. 



