I 



4 



Mineraloaical Notices. 221 



the acute lateral edge truncated. It does not properly dissolve 

 in pure water, but after a while is decomposed, the fluid becom- 

 ing brownish red and having an acid reaction; in water with a 

 Uttle sulphuric acid it is not decomposed. Analysis gave, 



S ¥e 5:a Sig K ft 



42-922 30-066 2*491 2-812 0-318 21-391=:100. 



In another trial Dr. List obtained 43 208 S and 30-365 Pe. The 

 zinc, magnesia and potash are attributable to mixture with some 

 sulphate of zinc, of magnesia, and of potash present as impu- 

 rity. Excluding these, the result becomes — 



47-0t5 40-622 12-313 



Oxygen 28203 12-170 10947 



whence the ratio, nearly, 2'5 : 1 : 1, and the formula Fe^s^+eff, 

 which is that of Copiapite (H. Rose) excepting the water which 

 is isS in that species. 



Manganese Ores of the Pyrenees, — For a paper on the posi- 

 tion and origin of these ores by M. Gruner, see Ann. des Mines, 

 [4,] xviii, 61. The author also discusses the origin of associated 

 minerals and ores. 



i 



Glaucodot. — This mineral according to Breithaupt, (Pogg. 

 Ann., Ixxxi, 578,) occurs at Orawitza in the Bannat along with 

 a pale yellow calc spar. It is thin columnar. M. Patera obtained. 

 Sulphur 19-78, arsenic 4363, cobalt 32-02, iron 4'56. 



Copper Nickel of Aijer. — Analysis by Ebelmen, (Ann. des 

 Mines, [4,J xi, ^5.) 



As Sb S Ni Co Fe 



54-05 0-05 2-18 43-50 0-30 045 Gangue 0*20 — 100-75 



White Blende of New Jersey, (Phil. Mag. [4], i, 23.)— The 

 colorless Blende from Franklin, New Jersey, called "Cleiophane^' 

 by Mr. Nuttall, has been analyzed by T. H. Henry, with the 

 following result:— Zinc 67'46, sulphur 32-22=ry9-68, corres- 

 ponding to a very pure blende. Sp. gr. at 60^^, 4*063. A trace 

 of cadmium was found by means of Wollaston's test. 



Troostile of New Jersey^ (Proc. Amer. Assoc, at New Haven, 

 4th meeting, p. 146.) — An analysis of Troostite bv Henry 

 VVurtz, afforded 



Si Zn Sfa te Mg ^a 



2Y-91 59-93 3-73 5-35 1'66 1-60 = 100-18, 



giving the oxygen ratio for the protoxyds and silica 14-96 : 14-50, 

 or very closely the formula 2a» Si. 



Calamine and Electric Calamine. — A paper on the analysis 

 <^f these ores by Emil Schmidt is to be found in the Jour. f. pr. 

 Chem., li, 257. 



WuJfenite or Molyhdate of lead from the mine Aznlaques^ 

 near Blanca in Zacatecas. — Analysis afforded Dr. C. Bergemann, 



