144 tnssrKTFTtOK a?w awamtsis of tekite. 



atance, but of a graj-er colour, and of an aspect similar to 

 that of certain asbestiform acti notes. It is accompanied by 

 oxjdulated iron, g^irnets, and hyaline quartz*. 

 An old sped- I have lately exaniined a specimen iu my mineralogical 

 mea said to collection, which 1 have had several years, and which, not 

 iiom Siberia, being able to refer it to any of the known minerals, 1 had 

 put into a particular place, as is my custom, for farther exa- 

 mination. This specimen is black yenite, imbedded and as 

 it were disseminated in the same gieen'sh substance. It is 

 ' accompanied with a note, that marks the pait of Siberia be- 



tween Perm and Tobolsk for its native place. I cannot 

 venture however to warrant the autlienticity of this indica- 

 tion. 



The substance of which I have given the history might 



perhaps be employed as an iron ore, and smelted for its 



rnetaJ, if it were more abundant than I have yet observed, 



and not so near one of the richest ir»a mines in Europe. 



Alwaysaccom- It has been seen, that the yenite, whether at Rio, at Cape 



panie ya Calamite, or in Siberia, is always accompanied with a green 

 green nimeral ^_ . •' . ' . . 



resembling substance, disposed in fibres or rays like actinote. To this 

 sirahlbtem. geological relation may be added, that tliere is a much closer 

 in their composition : these two minerals differ only in this, 



f , - * Mr. Fleiiriau dc Bellevue, to whom I showed the specimens cf 



found nine ... 



years ago. yenite I had, telling him 1 considered it as a new substance, informed 



me, that he himself had brought home specimens of the same mineral 

 from Cape Calamite nine years ago, and that it was analysed bj Mr, 

 ~^ Vauquelin the year follov/iiig. He at that time obtained from it 



, , . Silex 30 



Its analysis as _. _„ 



thaagiven. Lime 14 S 



Oxide of iron 49 



Oxide of manganese 2 



Aluniine , 1 



968 



J _ /J Sine', my memoir \^-a3 read, Mr. Gillet-Laumont has found in the col- 



LisIe'scoUcc- lection of Rome de l>isle, now in his possession, crystals of the same 

 tion. -substance ; and informs me, t1vat they were placed by that learned mi- 



neralogist at the end of the tin ores. I believe I may venture to assert, 

 that they came from Rio. Tliis mineral was at Paris therefore long be- 

 fore it was brought thither by Mr. Fleuriau de Bellevue, though it was 

 col known. 



that 



