SCtENTIFIC NEWS. 



m 



lour of pale white wine. Being precipitated with ammonia^ 

 I obtained some more oxide of iron, which washed and 

 roasted weighed 0-03. 



14. After having redissolved this oxide of iron, and that Silex to bede- 



of No. 10, there yet remained 0-008 of silex. f"^!^'^ ^'""^ 



, the iron. 



15. The residuum of No. 13 was found to be pure silex, suex 

 which, after having been dried and roasted, weighed 0'30. 



Accordingly 100 parts of this mineral contain. ^ 



Magnesia 28 parts. 



Carbonic acid • • 27 



Silex 30-8 



Oxide of iron ...*. 11'2 



Lime .•• 0*8 



Water 03 



9S-1 

 Loss ...• 1*9 



100 

 The most remarkable circumstance is, that this mineral Contains no 

 contains no alumine, and includes a large quantity of iron. ™'jro,i"jj^ 

 The outward appearance of the mass would lead us to sus- expectedo 

 pect the former substance, and its light colour by no means 

 indicates so large a quantity of the second. Probably the 

 carbonic acid combining with the oxide of iron conceals its 

 presence*. 



SCIENTIFIC NEWS. 

 Wernerian Natural History Society. 



_OlT the last meeting of the Wernerian Natural History Wernerian 

 Society (l4th May), Mr. P. Walker read an account of the ^°"^'y- 



* Mr. Klaproth, who had before analysed a specimen of this schist, Klaproth's 

 found in it: analysis of it. 



, Silex 66-5 



Alumine 7 



Magnesia 1 3 



Lime 1 25 



Oxide of iron , 2'5 



Water 19 



97-75 

 Loss 2-25 



100 



birds 



