188 Scientific Intelligence. 



This analysis agrees very closely with that of Richardson, and also 

 with those of Steininan, provided we subtract the silica and alumina found 

 by these chemists, and which are obviously impurities. The formula is 

 2 (Fe 2 3 ) P0 5 -f-12 HO. The greenish kidney-shaped masses were of 

 different composition, and their analysis leads to the formula 3 Fe 2 3 

 2 PO 5 -}-20 HO, but the author does not venture to describe them as a 

 different species. 



Gieseclcite. — A very pure specimen from Nunasoruaursak in Green- 

 land, gave — 



Silica 46-40 



Alumina 26*60 



Peroxide of iron 6*30 



Magnesia 8 - 35 



Oxide of Manganese trace 



Potash 4-84 



Water 676 



99-36 

 For this the author gives the formula — ■ 

 fMg 0\ 

 3 j Fe O J Si O3+2 Al 2 3 3 Si 3 -f 3 HO. 



Anauxite.^—A pure specimen of this mineral from Bilin, gave — > 



Silica 62-20 



Alumina 23*82 



Lime TOO 



Protoxide of iron.. 



i traces 

 Magnesia 



Water 1240 



} 



99-42 

 The formula is Al 3 3 Si 3 -f 3 HO, which is that of cimolite, but 

 although a similarity exist in constitution, there is none in mineralogical 

 characters, for anauxite is found in minute crystals, while cimolite is 

 amorphous. Breithaupt places it close to pyrophyllite, which however 

 contains much less water. 



[Several valuable communications have been received, which form want 

 of space are unavoidably postponed to next number.] 



