G. P. Merrill — Minor Constituents of Meteorites. 513 



titanium in the stone from Estracado, Texas. Everhart* found 

 0*09 per cent in that of Pickens County, Georgia; and Stokesf 

 found 0*08 per cent in the stone of Allegan, Michigan. These 

 occurrences are all dwarfed by Tschermak'sJ determination of 

 2*39 per cent in the stone of Angra dos Reis. The amounts 

 are, however, mostly very small and, knowing the difficulties 

 in the way of determination, it seems probable that it is a 

 more common and widespread constituent than is commonly 

 supposed. 



Vanadium. — Apjohn reported§ finding unmistakable evi- 

 dences of vanadium in the Limerick stone, but in amount too 

 small for quantitative determination. 



Zinc. — E. Pfeiffer, in the report || of his analysis of the 

 Parnallee stone, included traces of copper, tin, and zinc. J. L. 

 Smith^f found in the schreibersite from the Tazewell iron a 

 trace of zinc. I find no other recorded occurrence of this 

 element. 



But eleven meteorites have thus far been subjected by us to 

 the exhaustive treatment necessary to confirm or refute these 

 reported occurrences. Five are stones, two stony irons, and 

 four are irons. The results are given below. 



(1) Iron. Canyon Diablo, Arizona. A coarse octahedrite 

 iron with numerous interlaminations of schreibersite and inclu- 

 sions of graphite and troilite, the latter sometimes an inch or 

 more in diameter. In the selection of samples for analyses 

 these were avoided as far as possible. Carbon is present in 

 form of microscopic diamonds and also as graphite. It has 

 been the subject of numerous analyses, yielding variable results 

 owing to its coarse crystallization. Whitfield's analysis is 

 given in column I below. In column II is given the average 

 of three analyses by Moissan, Booth Garrett and Blair, and 

 Tassin. 



I II 



Silicon __. trace 0-032$ 



Sulphur... 0-009$ 0-007 



Phosphorus 0*261 0*159 



Manganese.. none none 



Copper _. 0-015 trace 



Nickel _. 7*335 5-828 



Cobalt _ 0-510 0-044 



Combined carbon 0-105 ) n-ia- 



Graphitic carbon 0-028 j 



* Science, xxx, 772, 1909. 

 fProc. Wash. Acad. Set, ii, 48, July, 1900. 

 % Tsch. Min. petr. Mitt., xxxviii, 110, 1909. 

 § Journ. Chem. Soc, London, xxvii, 104, 1874. 

 || Sitz. k. k. Acad, der Wiss. Wien, xlvii, 461, 1863. 

 ^This Journal, xix, 155, 1855. 



