Intelligence and Miscellaneous Articles. 459 



ANALYSES OF MINERALS. 



Radiolite, by Professor Hiinefeld. 



Silica 0-41880 



Alumina 0*23790 



Soda 0* 14069 



Potash 001012 



Water 0*10000 



Oxide of iron 0*00910 



Carbonate of lime 0*02500 



Matrix 0*05500 



0-99661 

 Datholite from the Hartz, by Dr. DuMenil. 



Lime 3559 



Silica 3851 



Boracic acid 21*34 



Water 4*60 



100-04 

 Bisnutthblend of Breithaupt, by Professor Hiinefeld. 



Carbonate of bismuth 58 - 8 



Arsenic acid 2*2 



Silica 238 



Arseniateofcobalt,copperandiron 5 *9 

 Matrix . 9*1 



998 

 White ironsinter from Freiberg, by M. K. Kersten. 



Arsenic acid 30*25 



Oxide of iron 40*45 



Water 28*50 



99*20 

 Schweigger's Jahrbuch, 1828. 



ANALYSIS OF THE IPECACUANHA BRANEA. BY M. VAUQUELIN. 

 This is the root of the viola ipecacuanha from Rio Janeiro j it is of 

 a pale white colour, of the size of a quill, crooked and knotty at un- 

 equal distances. Its fracture is even, and slightly resinous j its odour 

 is disagreeable, and its taste, at first scarcely perceptible, is afterwards 

 acrid and nauseous. Sixteen grammes of this root reduced to a fine 

 powder were macerated in water for forty-eight hours. The liquor was 

 decanted and fresh water added to the powder, and the maceration con- 

 tinued for the same time : this water was scarcely coloured • it was 

 poured off, and the residuum was treated with boiling water till it was 



exhausted. The whole of the liquors were mixed and filtered, arid 



evaporated with a very gentle heat. 

 The liquid became turbid, and deposited a flocculent substance of a 



dirty white colour, which being collected by a filter was proved to be 



albumen, by the ammonia and fetid oil which it yielded on distillation. 



The liquor from which the albumen was separated, after due evapo- 



3 N 2 ration 



