256 Geological Collections. 



more than Hungary, which is so rich in mines, and has an extent of more 

 than 5102 squai'e miles. — Hruschka. Denmark, we may add, produces 

 only about 30 mineral species ! — J. 



Kakoxene Professor Steinmann, of Prague, was the first to describe 



this mineral, of which he has given an analysis. It occurs in acicular, 

 radiated, and in earthy, or pulverulent forms. M. Hruschka has examined 

 its structure, and finds that its form is /iewiiprismatic, and that it thus differs 

 from waveUite, the crystals of whicj^are prismatic. — Bull, de Sci. Natur. 

 October, 1830. jjf 



Bituminous Spring in the United States The Louisville Advertiser states, 



that a spring of rock oil has been discovered in the county of Cumberland, 

 while boring a rock for water. On reaching a depth of 130 feet, the oil 

 gushed out, forming a jet of 12 or 14 feet above the ground. It flowed out 

 at the rate of 75 gallons in a minute, and veiy soon formed a little stream, 

 which ran into the Cumberland river, and covered its surface to a consider- 

 able distance. The oil burns well, and gives a brilliant light. Abundance 

 of salt water has been found in the neighbourhood, on boring to 200 feet, 

 and rising to the height of 25 feet above the level of the Cumberland river. 

 - Ibid. 



The Labrador of Finland. — M. J. Senff, (Poggend. Ann. XVII. p. 352,) 

 describes the following phenomena which he has observed in the labrador 

 felspar of Finland -. — 



1. In the direction of the principal cleavage are seen striae, some of which 

 are coloured, and some without colour. If the stone be turned 180° round 

 the axis of the surface on which the play of light is seen, the lines which 

 before were coloured, are now seen colourless, and vice versa. This phe- 

 nomenon is also seen in the labrador from other places. 



2. If a slip of labrador be turned, as before, about its axis, then for a 

 rotation of 90°, we have a new play of colours, for a rotation of 180° a 

 third, which appears opposed to the first, for a rotation of 270° a fourth, 

 opposed to the second. 



3. The labrador of Finland shews coloured crystallizations, that is to say, 

 the colours are distinctly separated from one another, and each of them 

 forms a rectilineal polygon, whose sides are parallel to the cleavages of the 

 crystal, and to the different secondary faces. These coloured polygons are 

 also concentric Ibid. 



It is this last character which peculiarly distinguishes the beautiful labra- 

 dors of Finland. M. Nordenschiold has published a scientific examination, 

 with measurements and drawings, of the coloured crystallizations, in the 

 Stockholm Transactions for 1830. The specimens which accompanied his 

 paper to the Academy, and which we were fortunate enough to see on their 

 arrival, were the finest we have ever met with J. 



Fulgurites. — M. Ribbentrop has lately found two of these vitrified tubes 

 in the green sand at Reinstein, on the north of the Hartz Mountains. 

 Similar tubes have been found in the waste of Senner. At the late meeting 

 in Hamburg, Professor Brandes exhibited to the Mineralogical Section some 

 beautiful specimens, eight or ten feet long, — one of which he presented to 

 the Swedish Academy of Sciences. 



Tin and Tellurium in Asiatic Russia M. Rose has been fortunate 



enough to discover sulphuret of tin in South Ural or Bachkyre, and a com- 

 bination of silver and tellurium in a mineral from Sawodinski near Altai. 

 The existence of tin and tellurium was, before owi voyage in the year 1829, 

 as unknown in Asiatic Russia as the existence of diamonds in European 

 Russia.— ^nn. des Sci. Nat. Oct. 1830. 



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