DESCRIPTtOK A?TD iNAtYSIS OF fENITFi 



Differs from 

 all others. 



At first view this mineral seems to approach t]\e epidote 

 in form : but in the first place the regularity of the faces 

 forms an objection ; and in the second, the measure of the 

 angles, and the laws of decrement, totally contradict this 

 apparent analogy. No other mineral substance has any si- 

 milarity with this new species, at least as far as respect* 

 form. 



Chemical cha= 

 racters. 



Component 



paits. 



Chemical characters. 



The yenite simply calcined becomes attractable by the 

 magnet, passes from black to a very dark reddish brown, 

 and loses about two per cent of its weight. 



It readily fuses before the blowpipe, without any sensible 

 ebullition ; and yields an opake, black button, very readily 

 attracted by the magnet, but without polarity, dull, and ex- 

 hibiting a metallic aspect. With glass of borax it dissolves 

 with a short effervescence. On continuing the fire an ena- 

 mel is obtained, that appears black : if a larger quantity of 

 borax be added, we have a transparent glass, of a yellow- 

 ish green colour, without any indication of a 'i J'taUic but- 

 ton, or residuuin; which proves, that the whu.e has been 

 dissolved. 



It is attacked by the sulphuric, nitric, and muriatic acids. 

 The last dissolves it most readily : the silex remains at the 

 bottom, and the solution acquires a fine yellow colour, with a 

 slight tinge of green. 



Analysis. 



It has been analysed by Messrs. Vauquelin and Descotiis, 

 and a hundred parts gave 



Descotiis. Vauquelin. 



Silex 28 



Lime V2 



Oxide of iron 55 



Oxide of manganese* • 3 



Alumine •• 0*6 



Loss , 1 '4 



29 

 12 



57 



30 

 12-5 



57*5 



100. 



100. 



100. 



Thi* 



