Mineralogy and Geology. 109 



age, it shows a low degree of brownish-red translucency ; streak brown- 

 ish-red ; hardness =4*0, or that of fluor ; specific gravity, according to 

 von Hauer, 3-463. 



In a glass tube before the blowpipe, an abundance of sulphur is given 

 off, leaving a green residue soluble in acids with a disengagement of 

 sulphuretted hydrogen. This residue when treated alone becomes su- 

 perficially brown again, before the blowpipe. A fragment treated with 

 salt of phosphorus does not (as is also true of manganese-blende from 

 Nagyag) become of a violet color in the outer flame, until the whole 

 of the sulphuret of manganese is decomposed. Upon platina foil with 

 soda, it gives the reaction of manganese. In composition, it would 

 therefore seem to be a higher grade of sulphuret of manganese ; and 

 guided by its isomorphism with iron pyrites, which is expressed by the 

 formula Fe S 2 , we may infer that the formula of Hauerite is Mn S 2 . 



According to the analysis of W. Adolphus Patera, the composition of 

 the substance in question is as follows : sulphur 53*64, manganese 

 42*97, iron 1*30, silica 120 = 9911, calculating the iron as sulphu- 

 ret of iron, and deducting it, this would give, in one hundred parts, 



Analysis. Calculation. 



Sulphur, 54-801 ■ 53*7 



Manganese, 45-198 46*3 



It is remarkable that the form of the only sulphuret of manganese, 



with which we were hitherto acquainted, (manganese-blende, alaban- 



<hne,) and whose composition is MnS, should likewise belong to the 



tessular system, and also show distinct cleavage parallel to the faces of 



the cube. Alabandine, however, is more semi-metallic in lustre, has a 



green streak, and gives off no sulphur in a glass tube before the 

 blowpipe. 



The writer first took the crystals from their color, form, streak, and 

 wanner of grouping, for weathered iron pyrites, when his attention was 

 drawn by Mr. von Hauer to their perfect hexahedral cleavage ; further 

 investigation then established the distinctness of this beautiful species 

 beyond a doubt. 



Hauerite occurs at the sulphur-pits at Kalinka near Vegles, m the 

 neighborhood of Altsohl in Hungary. The crystals are met with in clay 

 and in gypsum, occasionally associated with sulphur of a fine yellow 

 tint, which is nearly transparent. They occur either insulated or 

 grouped together like certain varieties of globular iron pyrites. 



The name proposed was given this species as an acknowledgment 

 *J the high merits of his excellency the Privy Counsellor and \ice 

 Resident, von Hauer, and because of the part which his son, Mr. 

 F - von Hauer, took in the determination of the species. The substance 

 w *s first noticed by Mr. C. v. Adler, at that time employed at Kalinka, 

 a **d from this gentleman several persons received specimens. Hauerite 

 *'» perhaps always remain a mineralogical rarity. The writer how- 

 ever looks forward with pleasure to the receipt of further specimens 

 direct from the mining authorities of Lower Hungary. 

 L 2. Coal and Iron in India, (Mining Journal, April 10, 1847.;— as it 

 h f now been determined by the East India Company, and support- 

 ed j>y government, that the railway system shall be extended to India, 

 a * d * guarantee given for a dividend on the capital invested, any m- 





