1823.] the same Crystalline Form as Pyroxene. 225 



Silica 54-64 containing oxygen 27*48 



Lime 24-94 7-0 



Magnesia 18-0 6-97 



Oxide of manganese . . 2'0 



Oxide of iron with mag 



nesia 1*08 



100-66 



Yellow Malacolite from Longbanshyttan, in Wermeland. 



It occurs with red silicate of manganese in magnetical iron 

 ore. Its colour is yellowish; its powder of a lighter colour ; 

 it is semihard ; gives with difficulty sparks with steel ; is trans- 

 lucent at the edges. M. Rose's analysis gave 



Silica 55-32 containing oxygon 27-82 



Magnesia 16-99 6-58 



Lime 23-01 6-46 



Oxide of manganese .. 1-59 

 Oxide of iron 2-16 



99-07 



M. Hissinger has analysed another malacolite from Longban- 

 shyttan ; the composition is nearly the same. 



Silica 54-18 containing oxygen 27-25 



Magnesia 17-81 6-89 



Lime 2272 638 



Oxide of manganese. . . 2-18 



Oxide of iron 1-45 



Loss by heating 1*20 



99-54 



M. Bonsdorf, of Abo, has analysed a white malacolite from 

 Tammare, in Finland, which gave the following results : 



Silica 54-83 containing oxygen 27*58 



Lime 24-76 6-95 



Magnesia 18-55 7*18 



Alumina 0-28 



Oxide of iron 0-99 



Loss by heating 0-32 



99-73 



The Count of Trolle Wachtmeister analysed a white malaco- 

 lite from Tafel Tyotten, in Norway ; its composition was, 

 Neu> Series, vol. v. q 



