Mineralogy. 363 



Iron, - - 35.5 



Manganese, - 16.5 



Phosphoric acid, - 48 



10.0 

 Ann. de Chim* vol. xxx. p. 130. 



36. Analysis of Huraulite, a new Mineral. This mineral was found in 

 Haut Vienne, by M. Alluau. M. Vauquelin found it to consist of— 



Iron of manganese, - 47.2 



Phosphoric acid, - 32.8 



Water, - 20 



Ann. de Chim. vol. xxx. p. 307. 



37. Analysis of the Fer Oxide Resinite of Hauy. This mineral, called 

 also Fer Piciforme, is from the mine of Kust. near Freyberg. M. Lau- 

 gier found it to consist of— 



Peroxide of Iron, 

 Arsenic acid, 

 Sulphuric acid, 

 Water, 



99 

 Ann. de Chim. vol. xxx. p. 331. 



38. Analysis of a new variety of Wolfram. — This mineral, from Haut 

 Vienne, has been found by M. Vauquelin to be composed as follows,— 



39. New Crystalline form of Apophyllite in America. — This new form 

 of apophyllite was found in a geode imbedded in the amygdaloidof Port 

 Marmouze, on Lake Superior, 44 miles N. W. of the straits of St Mary 

 The geode found by Dr Bigsby was presented by him to Dr G. Troost. 

 This apophyllite exfoliates, like the European variety, before the blowpipe 

 and melts into a white enamel, which, by a prolonged application of heat 

 changes into a semi-transparent glass. It does not require so much heat 

 for its fusion as the European variety, but coincides with it in its other 

 characters. One of the crystals of the apophyllite exceeds half an inch 

 in length. It has the appearance of an elongated octohedron, with the 

 angles of the base truncated, and its edges emarginated. Dr Troost gave it 

 the name of Apophyllite Mixtunitaire. The angles are M upon M 90° ; 

 M upon the faces of the pyramid 127? 59 ; M upon the emarginated 

 edges 149° 29' 30".— See Journal Nat. Soc. Philadelph. vol. v. p. 52. 



