Jamieson — Natural Iron-Nickel Alloys. 415 



These two iron-nickel alloys are quite similar in composition 

 to those which have already been described from other locali- 

 ties, and for comparison, a table has been arranged to show per- 

 centages of iron and nickel which these various alloys contain. 

 The first analysis is that of an alloy found at Gorge River, 

 which flows into Awarua Bay on the west coast of South Island, 

 New Zealand, described by W. Skey* in 1885 and to which the 

 name awaruite was given. The second analysis, by A. Sella, f is 

 of an alloy from the gold-bearing sand of the Elvo River, near 

 Biella, Piedmont, Italy. The third analysis, by Melville, is of 

 material from Josephine Co., for which the name Josephinite 

 was suggested. No. 4 is a recent analysis by F. G. Wait, 

 quoted by G. C. Hoffmann,:}: of a similar alloy from Eraser 

 River, British Columbia, to which Hoffmann has given the 

 name souesite, as stated by him, " to distinguish this find from 

 that of other naturally occurring iron-nickel alloys." The last 

 two analyses are those of the present writer. 



Locality. Analyst. Fe. 



1. New Zealand Skey 31-02 



2. Piedmont, Italy Mattirolo 26*60 



3. Josephine Co/ Melville 27'41 



4. British Columbia Waite 2230 



5. Josephine Co. Jamieson 25 '24 



6. Del Norte Co. " 21*45 



It is seen from a glance at the analyses of the alloys from 

 the five different localities, that there is a certain uniformity in 

 composition, but that they are not a definite compound of iron 

 and nickel is evident, nor would this be expected; with 

 Fe : Ni = 1 : 3, the percentages are Fe 24*00 and Ni 76*00, to 

 which most of the analyses approximate, while for the ratio 

 1 : 2 the values are Fe 32*19 and Ni 67*81. It seems unfortu- 

 nate that so rare a substance should have received three dis- 

 tinct names, awaruite, josephinite, and souesite, and it is urged 

 that awaruite, which has priority, should alone be used. 



As regards the occurrence of the alloy, its association at 

 Josephine Co., Oregon, with serpentine, and at New Zealand, 

 Piedmont, Frazer Piver, and Del Norte Co., Cal., with chro- 

 mite, suggests that it is a material which has separated from 

 basic periclotite rocks, and, as it seems to have no tendency to 

 deteriorate by oxidation, it is found as a heavy constituent in 

 adjacent river sands. 



In closing, it is desired to thank Mr. Bixby and Dr. Day for 

 the material which they had sent to the laboratory for investi- 

 gation, and also Professor S. L. Penfield for his help and valu- 

 able suggestions. 



Sheffield Scientific School of Yale University, May, 1905. 



* Trans. N. Zeal. Inst., xviii, 401. fComp. Rend., cxii, 171. 

 % This Journal (4), xix, 319, 1905. § Contains cobalt. 









Other 



Ni. 



Co. 



Cu. constituent 



67*63 



•70 



none 



•63 



75*20§ 





none 



__ 



71*35 



•65 



•59 







76*48 



none 



1*22 



._ 



77*17 



•46 



.. 



•13 



76*60 



1*19 



•59 



•10 



