18 Annals of the South African Museum. 



To allow convenient comparison, the analyses of the two specimens 

 are given here together : — 



Vienna. Cape Town. 



I.d 11./ 



Fe 91-21 92-20 



Ni 8-01 7-30 



Co..^ 0-63 0-67 



Cu 0-02 0-08 



C 0-08 0-08 



CI 0-05 0-03 



P 0-22 0-19 



S trace 0-03 



100-17 100-53 



Sp.gr 7-7876 7- 



I.e ll.g 



Fe 91-61 92-21 



Ni 7-73 7-03 



Co 0-61 0-65 



Cu 0-02 0-03 



C 0-03 0-08 



100-00 100-00 



Sp. gr 7-8137 7-8308 



Since, as already stated, the relative amomits of kamacite, taenite, 

 and plessite occurring throughout an octahedral iron are not usually 

 constant, the differences in chemical composition shown in the above 

 tables are not so great as to exclude the possibility of the two 

 specimens belonging to one meteorite. On the other hand, as will 

 be learned from the descriptions, and seen at once by a comparison 

 of the reproductions of the etched surfaces given on Plate V.,* the 

 two blocks differ more in structure than has yet been observed in any 

 single octahedral iron. So far as our present experience allows, we 

 can, therefore, scarcely assume, without further proof, that these 

 two irons are of common origin, but must rather wait until similar 

 structural differences have been found coexistent in an undoubted 

 single fall.f This reserve appears the more necessary since the 



* As the slices were inclined so as to secure better illumination, the vertical 

 and horizontal reductions are not equal— the former being about f , the latter 

 about \f of the real size. 



t In the iron from Forsyth Co. I found one part compact and another finely 

 granular, but this after all is but a difference in texture, and not as here a 

 thoroughgoing difference in the actual structure. Das Meteoreisen von Forsyth 

 Co., Georgia, Vereinigte Staaten. Sitz. Ber. der k. preuss. Akad. d. Wissensch, 

 zu Berlin 1897, 886-896, 



