May, 1902. 



Meteorite Studies, I — Farrington. 



3ii 



tative analysis of some filings from this mass showed the presence 

 of nickel and indicated, as might be expected since no other source of 

 iron probably lay open to the Mound Builders, that the objects were 

 made of meteoric iron. Upon removing the rust from one surface 

 and submitting the area so exposed to the etching action of nitric 

 acid, the meteoric nature of the iron was proved beyond question by 



Fig. 5. Outline of Hopewell Mounds meteorite, with etched portions showing curving of the 



Widmanst&tten figures, probably due to heating and hammering that 



the mass has received. X %. 



the appearance of Widmanstatten figures. The nature of these fig- 

 ures is shown in Figs. 5 and 6, where the structure of bands of kam- 

 acite separated by thin ribbons of taenite can. be plainly discerned. 

 The width and continuity of the kamacite bands varies consid- 

 erably. Some are at least a millimeter in width and from these 

 they grade down to not over twice the width of the corresponding 

 taenite ribbon. While many are continuous in a general way for a 

 length of from 10 to 20 millimeters, the taenite runs through them all 

 in a series of anastomosing branches and in places gives the impres- 



