344 Review of Alger^s Phillips' Mineralogy^ 



lumbite of Bodenmais, lately shown to be distinct in crystallization 

 as well as composition.* 



Silicates of 3Iatiganese, (p. 395.) The silicate and sesquisili- 

 cate of manganese from Franklin, N. J., established as species 

 by Dr. Thomson, and here retained, are believed to be only im- 

 pure or half decomposed varieties of the common bisilicate of 

 manganese, (Kieselmangan of the Germans.) 



Torrelite of Renwick, (p. 418.) This supposed species was 

 long since shown to be an impure ferruginous jasper. 



Arsenate of Iron, (p. 373,) Scorodite, (p. 599.) These are 

 one species, the analyses of the former being the correct compo- 

 sition of the latter. One of these analyses is repeated under Sco- 

 rodite. 



Ter-arseniet of Cobalt, (p. 446.) This species is considered 

 by Berzelius as a mechanical mixture, probably of cobaltine and 

 sulphuret of bismuth.f 



Pimelite, (p. 455.) This mineral is clay colored with oxyd 

 of nickel, and not a distinct species. 



Biotine, (p. 697.) Brooke has studied the crystals of this 

 mineral, and shown them to be identical with anorthite.J 



Breislakite, (p. 608.) This mineral was supposed to contain 

 copper as a principal ingredient, as is stated in the work before 

 us. But late examinations have shown that it is not an ore of 

 copper, and is not far removed from the horriblende family.'§> 



Pickeringite, (p. 616.) The analysis by Thomson of speci- 

 mens supposed to be this species, should not be permitted to throw 

 doubts over the results of our own chemist, Mr. Hayes. Dr. 

 Thomson must have either made some error in his analysis or 

 have examined some other species. 



Stellite, (p. 624.) The Pectolite of von Kobell and Stellite of 

 Bergen Hill, N. J. have been united by Alger, as was done also by 

 Dana. To these Mr. Alger has proposed to add the stellite of 

 Thomson : and the three united he calls stellite. But we should 



** See this Journal, Vol. xxxii, p. 149, on the identity of Torrelite of Thomson 

 with columhite, by J. D. Dana; also Rammelsberg's Handworterbuch, vol. ii, p. 

 195, where he states that it has essentially the same composition with the Boden- 

 mais columbite. 



t Rammelsberg's Handworterbuch, ii, 274. Berz. Jahresb. vii, 175. 



t Phil. Mag., vol. X, 1837. 



§ Rammelsberg's Handworterbuch, supplement, p. 32. 



'^ji#*' 



