The Meteoric Iron from Bethany, Great Namaq^taland. 29 

 From this we obtain as percentage composition of the nickel- 



I. II. 



91-22 91-75 



7-65 



0-56 



0-03 



0-01 



100-00 100-00 



Prom the amount of nickel and cobalt in the second analysis it 

 follows that the fine scales in the non-lamellar portions are to be 

 regarded as taenite — that is to say, an alloy rich in nickel. Com- 

 parison of the analyses shows that the proportion of this substance 

 present, is in keeping with the appearance of the whole, it being 

 somewhat greater in the parts showing a normal structure than it is 

 elsewhere. 



Finally, if one calculates from Table I. the mineralogical compo- 

 sition of the piece analysed, the following result is obtained : — 



Nickel-iron 99 "51 



Schreibersite -39 



Daubreelite 0-05 



Troilite 0-04 



Lawrencite '01 



100-00 



I have here, as formerly, calculated the whole of the chromium 

 obtained in solution as belonging to the daubreelite. Since, how- 

 ever, recent analyses of the Cape of Good Hope and Babbs Mill 

 irons give less sulphur than the formula of daubreelite requires, the 

 correctness of this mode of calculation appears questionable, 

 especially as daubreelite is almost always observed as subsidiary 

 inclusions in troilite, and the latter must always be present 

 in much greater amount than the former. It is possible that 

 the chromium occurs either in another compound also soluble in 

 aqua regia, or that it is alloyed to some extent with the nickel-iron. 

 At the same. time the small amount present makes it of little conse- 

 quence where one includes it. 



Dr. W. Leick determined the specific gravity from a piece weigh- 

 ing 82-123 grams as 7-8408 at 18-5° C. From this the specific 

 gravity of the nickel-iron would be 7-8502. 



The chemical composition and specific gravity of this Bethany 

 iron agree well, therefore, with those of other finely lamellar octa- 

 hedral irons.* 



* Compare E. Cohen, Meteoreisen-Studien IV. u. V. Ann. des k.k. natui'hist. 

 Hofmuseums, 1895, x. 90-91, und 1897, xii. 44-45. 



