Miscellanies. 375 



nation, formed directly, — that is to say, determined by the power 

 alone of the elements which compose it. — Rev. Encyc. JYov. 1832. 



13. JYeio Febrifuge. — Among the vegetable bitters found in 

 France, J^erde-Delisle and Cottereau have discovered that the 

 leaves of the Ypreau or White Dutch Poplar hold the first rank. 

 The fresh leaves of this tree are endowed with a bitterness which 

 approaches to that of the Cinchonas. They have been ascertained 

 to possess, in a high degree, both in infusion and in maceration, the 

 property of counteracting the periodicity of fevers. 



MINERALOGY AND GEOLOGY. 



1. Analyses of Fer Titane of Baltimore, Maryland ; by M. P. 

 Berthier. — This mineral is found in very considerable quantities 

 in gneiss. Attempts have been made, unsuccessfully, to melt it in 

 high furnaces. It is sometimes in pure masses, and at others inti- 

 mately mixed with gneiss. The pure mineral is compact, fracture 

 unequal, shining, and has magnetic polarity. Specific gravity 4.9. 

 Powder grey, but very often has a decided tinge of red, owing to an 

 obvious mixture of peroxide of iron. The mixed mineral often has 

 a schistose texture. Its gangue exhibits shades of red and green. 



This mineral is acted upon slowly by aqua regia. When re- 

 duced to an impalpable powder by porphyrisation, it dissolves readi- 

 ly in boiling concentrated sulphuric acid. . By adding tartaric acid to 

 this solution, (perhaps diluted,) the iron and titanium are separated 

 by following the process of H. Rose. Concentrated sulphuric acid 

 dissolves nearly all minerals composed of oxide of iron and titanium, 

 when the latter is not in too great proportion. 



As the Baltimore mineral does not contain the least trace of man- 

 ganese, it is possible to dose the two elements of which it is com- 

 posed, with much exactitude, by means of a simple process in the 

 dry way : 



20 gr. of the mineral, - - - 20.00 



10 calcined argil, - - _ _ 10.00 



7 marble, = lime, ~ - - _ 3.94 



33.94 gave 



