<3E0L0&T OF tME VICINITY OP bUBLlN. dg^ 



«^ 



lar greenish colour; with the addition however of bluish 

 gray granular limestone, and a fibrous substance, not im- 

 probably tremolite, mixed with carbonate of lime, I have 

 not seen any felspar in the specimens from Donegal*. 



2. Grenatite. (Staurotite, Haiiy). This was detected by Grenatite^ 

 Mr. Stephens in crystals in a micaceous compound of which 



I found a specimen at the Glenmalur lead mines in the 

 county of Wicklow ; the crystals are small, but their colour^ 

 ' form, and characteristic Crossing are tefy distinct, and they 

 are infusible before the blowpipe, > '>- ^ ' ; . ; 



3. Beryl. (Var. of Emerald, Hatty). The precious beryl Berjl. 

 has been found by Mr. Stephens arid myseliF imbedded in 

 granite, near Lough Bray in the county of Wicklow. 



., (Museum of Dublin College, No. 39.) Mr. Weaver has 



discovered it in blocks of granite, near Cronebane in the 



'same county; and 1 have found in the Dublin mountains, 



"above Dundrum, spedm^ns pi'obably belonging to the same 



species. 



4. Andalusite. (Feldspathapyfe, Haiiy). This ha^ been Andaluslis. 

 found by Mr. Stephens and myself, in very distinct spebi- 



,meris, on the north east side of Douce mountain in the 

 ''county of Wicklow, apparently imbedded in the mica sUte 



' of which thait mountain is composed, and accorapaniedliy 

 quartz, mica, and a remarkable crystallized substance here- 

 after to be mentioned. It differs from the andalusite of 

 Spain and of Scotland chiefly by inferior hardness ; for al- 



' tnough some pieces scratch window-glass, others yield easily 

 ■to the knife: but the Count de Bournon has observed an 

 equal variation in the hardness of specimfensof this substance 

 found by him at Forezf; and I have found that of the Scot- ' 

 tish stone to vary very much, ■ ' 



This fossil seems to have been first taken notice of under 

 the name of wurflicher (cubic) felspath by Karsten, who 

 took his description from specimens in the Leskean cabinet 

 now in Dublin J (No. 907 h, &c.) ; and from a comparison 



* Since this paper was written, I have found that this compound from 

 ?f<jpoiiegal has been described by Mr. 'Sowerby. British Mineralogy, 

 ^'.August, 1810, p. 133. ., ^ ., ^. y, 



t Journal de Physique, XXXIV, p. 4.53. 1789. ^ •.,j^]fr• , l-I 



J Bergmann's Journal, vol.11, p. 809, Ann, 1788, 



or 



