FALLEN ON THE EARTH. 159 



Silica ... - 27 



Magnefla - - - - 13-§ 



Oxide of iron - - «* - ^i 



Oxide of nickel I 



49$ 



EXAMINATION OF THE BOHEMIAN IRON. 



26f grains of this metal, left about If grain of earthy mat- Bohemian Iron 

 ter, infoluble in nitric acid; and, by ammonia, afforded 30 I7 P ercent - d9 - 

 grains of oxide of iron, inducing an eftimation of nearly 5 of 

 nickel. 



EXAMINATION OF IRON FROM SENEGAL, 



BROUGHT BY GENERAL O'HARA, AND 



GIVEN TO ME BY MR. HATCHETT. 



In this experiment, 199 grains of oxide were produced Senegal iron- 5 

 from 145 grains of metal; hence, there may be an eftimation ^ tto< psr cent * 

 of 8 grains in 145, or between 6 and 6 percent, of nickel. 



It will appear, from a colleded view of the preceding pages Summary of the 



and authorities, that a number of ftones anerted to have fallerf< haraa "* of the 



ftones fallen on 

 under fimilar circumftances, have precifely the lame characters, the earth. 



The ftones from Benares, the ftone from Yorkfhire, that from 

 Sienna, and a fragment of one from Bohemia, have a relation 

 to each other not to be queftioned. , 



lft. They have all pyrites of a peculiar character. Pyrites, oxide 



2dly. They have all a coating of black oxide of iron. of ,ron » nicke, » 



3dly. They all contain an alloy of iron and nickel. And, fpondent. 

 4thly. The earths which ferve to them as a fort of con- 

 necting medium, correfponcj in their nature, and nearly in 

 their proportions. 



Moreover, in the ftones from Benares, pyrites and globular 

 bodies are exceedingly diftinct . In the others they are more or 

 lefs definite ; and that from Sienna had one of its globules 

 tranfparent. Meteors, or lightning, attended the defcent of the Meteors or light- 

 ftones at Benares, and at. Sienna. Such coincidence of cir- nin S accom P»- 

 cumftances, and the unqueftionable authorities I have ad- nyiWS * em * 

 duced, muft, I imagine, remove all doubt as to the defcent 

 of thefe ftony fubftances ; for, to difbelieve on the mere 

 ground of incomprehenfibility, would be to difpute molt of 

 the works of nature, 



3 Refpecting 



