GEOLOGICAL SOCIETY OF PENNSYLVANIA. 



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the existence of native iron, than to give the result of 

 this investigation as satisfactory, for we look upon the 

 quantity examined as having been much too small to allow 

 us to appreciate those substances that usually accompany 

 native or meteoric iron, which most frequently are found 

 in very small quantities. We hope to be able, at some 

 future day, to give a more satisfactory history of this in- 

 teresting substance. 



