Third Supplement to Danas Mineralogy. 



249 



3. Descriptions of Species. 



Allantte [Mia p. 208, and Suppl. i, Ii]. — Description and analysis of Allanite from 

 Norway, by D. Forbes and T. Dahll (Nyt. Mag. f. Nat. xiii, 213). At Helle, in crys- 

 tals sometimes 4 inches long and f to 1 in. thick, with quartz and mica; many of 

 them decomposed and unaltered massive specimens have H. =6, G. =3 46 — 3-48. 



Specimen from Nas Mine, occurring in red orthoclase, gave H =6, G — 2 86 — 2 93, 

 a greenish-black color and greenish-gray streak, and afforded on analysis: 



Si €e Be 2tl Pe La, Di Y Ca fi 

 £1-03 7 24 3-71 9 29 22 98 4'35 1*02 6 39 12*24 alkali and loss 1-75 



Allanite occurs at Criffel in Scotland in small crystals in syenite and feldspathic 

 granite ; R. P. Grey, Jr. 



Alum [p. 382]. — Occurs in the caves of the Unaka Mts., Eastern Tennessee, es- 

 pecially at Sevier, where masses of a cubic foot may be obtained ; also in the 

 black slate of Middle Tennessee; in caves along the valleys and gorges of the 

 streams in DeKalb, Coffee, Franklin, and other counties. — Satford's Rep, p. 118. 



Alunogen [p. 381]. — Occurs at Vesuvius with alum, Scacchi, op. cit., p. 194. 



A white fibrous alunogen (?) occurs abundantly at Smoky Mountain. Jackson Co., 

 N. Carolina. According to Mr. Faber, there are tons to be blasted at that locality. 

 — (Prof. J. C. Booth, in a letter to the author.) 



ALVITE. D. Forbes and T. Dahll (Nyt. Mag f. Nat. xiii).— From Helle and 

 Naresto in Norway. In dimetric crystals like zircon. Fracture splintery. H.= 

 5 5. G.=3 601 —3 46. Color reddish brown, becoming grayish brown by alteration. 

 Lustre greasy ; opaque, on the edges translucent. B.B. in the platinum infusible, 

 color somewhat paler. With borax a glass greenish yellow while hot, colorless 

 when cold. With salt of phosphorus a yellow glass, green, and finally colorless on 

 cooling. With tin no titanium reaction. In fine powder, not attacked by the acids. 

 An analysis of the mineral on a very small portion and part of it somewhat altered 

 afforded 



Si 2tl,»e #e 2r £e y Th (?) Ca Cu, Sn fl 

 20-33 14 11 9-66 392 0-27 2201 15 13 0-40 trace 9 32=97 24 



Andalusite [p. 257 and Suppl. i, n]. — Analysis (1) of the Andalusite of Katha- 

 rinenberg near Wunsiedel, (2) of Robschiitz near Meissen, and (3) of Braunsdorf 

 near Freiberg, by E. E. Schmid, (Pogg. xcvii, 113): 





Si 



m 



3Pe 



Ca 



Mg 









1. 



35-74 



56 98 



571 



0 15 



0-20 = 



99-78 



G. 



=312 



2. 



36-84 



55-82 



3 22 



1-09 



114 = 



98 11 



G. 



= 3 11 



3. 



37-57 



59 88 



1 33 



0-61 



017 = 



9^-56 



G. 



= 3 07 



Oxygen ratio for the silica and sesquioxyds (1) 2:3 06,(2) 2:2-77,(3) 2:2 86, 

 corresponding nearly to the formula £l 3 Si 2 " [Allowing that the protoxyds ure com- 

 bined with part of the silica, Nos. 2 and 3, will give much more nearly the ratio 

 2:3.] 



Anglesite [p. 370, and Suppl. n]. — Kokscharov figures a fine crystal of Anglesite 

 from Monte Poni, Sardinia (Min. Russl. ii, 16S). He mentions the occurrence of the 

 planes flf, 12 ; and gives the angles /: 7=103° 43£\ O : 1=115° 35£'. 



Apatite [p. 396, and Suppl. 1, 11].— Occurs in New Jersey, at Mt. Pleasant Mine, 

 near Mt. Teabo, in a low hill near the junction of the Rockaway River ami the 

 Burnt Meadow Creek, and about three-fourths of a mile from the canal. The masses 

 are sometimes 6 inches in diameter. Apatite is also abuudant with the magnetite of 

 Byram mine.— N. J. Geol. Rep. 1856. 



Aragonite [p. 448, and Suppl. 11]. — Pseudomorphs of the scaly massive carbon- 

 ate of lime (called Schaumkalk in German) after gypsum are described by G. Rose 

 in Pogg. Ann. xcvii, 161. Near WiederstaJt in Mansfeld, a fine-grained gypsuin 



SECOND SERIES, VOL. XXII, NO. 65. SEPT., 1856. 



32 



