1914.] NATLUAL SCIENCES OF PHILADELPHIA. 565 



^ Large irregular masses of meteoric iron o.xide or large "shale balls," 

 from 100 pounds to 300 pounds in weight, due to oxidation of meteoric 

 iron rich in chlorine and sulphur, or shale-ball iron, 

 c Small broken fragments of meteoric iron oxide or "iron shale" (a few 

 grains or ounces, rarely a pound in weight). Thousands of such pieces 

 found, hence distribution only approximated. 



