ANALYSES OF METEORIC STONES. 



S9 



specimen of the stone, in which Mr. Sage had found it; 

 but this geiitieman had none left, except the piece fashioned 

 into a vase. Mr. Vauquelin however saw the products ob- 

 tained by Mr. Sage, and was induced to think, that what , 

 he had considered as alum was a mixture of the sulphates 

 of alumine, iron, and nicjcel. The subsequent analysis by but now cors* 

 Mr. Vauquelin however, given above, not only confirms "■■*"^*' 

 the existence of alumine in these stones ; but that, as Mr. 

 Sage observed, it is in very different proportions; for the 

 stone of Stannern contained more than either of the stones 

 analysed by Mr. Sage. Jn the following extract of a let- 

 ter from Mr. Klaproth we find farther confirmation of the 

 fact. C.'^ 



VIII. 



Extract of a Letter from Mr. Klaproth to iWr.GEHLEN*. 



JL HAVE just fini&hed the analysis of a meteoric stone, Analysis of 

 that fell in the afternoon of the 13th of May, I8O7, in the ^''.''^^" "^^'•* 

 district of Juchnow, in the government of Smolenski, du- 

 ring a very heavy thunderstorm with a cloudy sky. It 

 weighed 4 poods, or l-iOlbs. Berlin weight [I24lbs. avoir.]. 

 Like all meteoric stones it is covered with a slight grayish 

 black crust. Interiorly it is of an earthy ashen gray. It 

 is mixed with many little specks of pyrites, globules of iron, 

 and many spots of brown oxide of iron. Its specific gravity 

 js 3-7. It gave me as its component parts; 



Metallic iron 17*60 



Metallic nickel 0*40 



Silex 38 



Magnesia 1 4*25 



Alumine 1 



Lime • 0*73 



Oxide of iron 25 



Loss, including a little sulphur, 

 and a trace of manganese . . • • 3 



100. 



* Apnales de Cliimie, vol, LXX, p. 16^. 



It 



