OF A METEORIC STONE. 339 



is still farther proved, by the production of a black colour, 

 when a solution of this salt was mixed with the hidro-sulphurci 

 of ammonia. 



9. The fluid from which the nickel had been precipitated 

 was now of a yellow colour, unmixed with green. This must 

 have resulted from the hidro-sulphuret of ammonia, and nothing 

 could now be detected in the solution, except what had pro- 

 ceeded from the various re-agents employed. There was, how- 

 ever, one other constituent of the stone, of whose existence the 

 eye furnished decisive evidence, of which no account has hi- 

 therto been given, namely, the sulphur. As to the quantity of 

 this, I can give only an estimate. Of the grounds of that 

 estimate, together with the fruitless attempts which were made 

 to collect the sulphur, I will speak presently, but, for the sake 

 of concluding this head I will now add, that the sulphur was 

 estimated at 1,. If this analysis be correct, then, the iOO grains 

 which were examined, afforded, 



Silex, -- 51,5 



Attractable brown oxid of iron, ----- 38, 



Magnesia, ----------- 13, 



Oxid of nickel, ---------- \ t s 



Sulphur, ------------ i ; 



105, 

 The excess, instead of the usual loss, proceeds manifestly 

 from the oxidizement of the iron, in a considerable, but un- 

 known proportion. I must add, that the proportions of these 

 ingredients vary in different parts of the stone, as is manifest to 

 the eye, and will be immediately more fully evinced. In the 

 analyses of others, should there be found some difference of 

 proportion, it will not necessarily indicate a contradiction. The 

 great point of the similarity of the stones to those which have 

 fallen in other countries, and which have been analysed by 

 Howard, Vauquelin, Klaproth, and Fourcroy, who have been 

 my guides in this investigation, will now, in all probability, he 

 considered as sufficiently established. Had the daily avocations 

 of a course of public lectures, allowed the necessary time, I 

 should have attempted something like a complete analysis of 



