No.L) RESEARCHES ON METEORITES— MERRILL. 9 



and often in analyses made under such conditions as to give rise to a feeling of doubt as to their 

 correctness. Trottarclli's reported finding of palladium has already received attention. J. M. 

 Davison" obtained from 608.6 grams of the Coahuila iron 0.014 gram of platinum; from 464 

 grams of the Toluca iron a few crystals of potassium platinic chloride were obtained which 

 showed a reddish color and probably contained iridium. Tassin '' doubtfully reported the acid 

 soluble portion of the Persimmon Creek iron as containing traces of platinum too small to weigh. 

 Mallet's work on the Canon Diablo iron is confirmatory, however, of its occasional- occurrence 

 (see p. 10). 



Tin. — Tin to the amount of 0.17 per cent SnO^ was reported <^ by Stromeyer and Wahn- 

 stedt as long ago as 1825 as occurring in the olivine of a pallasite. Unfortunately some doubt 

 exists as to whether this was the pallasite of Kxasnojarsk or Steinbach. Rammelsberg in 1884 <^ 

 reported findmg 0.08 per cent Sn in the metallic portion of the Klein-Wenden aerohte, and he 

 also tabulates ^ 0.57 per cent Sn in the analysis of the Nashville ( ?) Tenn., iron. Jackson f 

 thought to have found 0.063 per cent Sn in an iron from Dakota, while C. A. Joy reported 9 0.44 

 per cent SnOj in the mineral portion of the Atacama pallasite, and Mallet reported '^ 0.002 per 

 cent to 0.003 per cent Sn in the iron from Staunton, Virginia. Still more recently traces of the 

 metal have been reported in the Barraba and Cowra, New South Wales, irons, by J. C. H. Min- 

 gaye.* Coming from such a source the statement might well be considered as conclusive (see 

 further p. IS). Numerous other occurrences of like small amounts are mentioned in the litera- 

 ture, the copper and tin being frequently undifferentiated. Although not so stated, the infer- 

 ence may be drawn, with the possible exception of that found in the olivine above noted, that 

 tin, if present at all, occurs mainh^ if not wholly in the metallic portion. 



Titanium. — Rammelsberg J foimd 0.16 per cent titanic oxide (Ti02) in the insoluble residue 

 from the Juvinas stone. This is the first reported occurrence. Davison reported '' traces of 

 titanium in the stone from Estacado, Tex. Everhart ' found 0.09 per cent in that of Pickens 

 County, Ga.; and Stokes'" found 0.08 per cent in the stone of Allegan, Mich. These occur- 

 rences are all dwarfed by Tschermak's " 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 determmation, it seems unquestionable that it is a common and \videspread constituent. 

 Vanadium. — Apjohn reported " finding immistakable evidences of vanadiimi in the 

 Limerick stone, but in amoimt too small for quantitative determination. The occasional 

 presence of the element seems now confirmed beyond doubt. 



Zinc. — E. PfeifiFer, in the report p of his analysis of the ParnaUee stone, included traces 

 of copper, tin and zinc. J. L. Smith ' found in the schreibersite from the Tazewell iron a trace 

 of zinc. I find no other recorded occurrence of tliis element. 



ra. DETAILED CHEMICAL AND MINERALOGICAL DETERMINATIONS. 



In the following pages are given in considerable detail the results of my investigations, 

 the chemical analyses upon which most reliance is placed being mainly those of Dr. J. E. 

 Whitfield, as before stated, though in the final tabular statement I have brought together the 

 work of such other analysts as seems sufficiently detailed or given in such forms as to merit 

 attention. The results given in the first paper are here repeated. The oi'der of arrangement 

 is alphabetical, imder the three heads Irons, Stony-irons, and Stones. 



(1) Iron. — Canon Diablo, Ariz. A coarse octahedral iron with nmnerous interlamina- 

 tions of schreibersite and -inclusions of graphite and troihte, the latter sometimes an inch or 



o Amer. Joum. Sci., vol. 7, 1899, p. 4. J Pogg. ^Vnn. Phj-s. Chem., vol. 73, 1848, p. 585. 



6 Proc. U. S. Nat. Mus., vol. 27, 1904, p. 959. * Amcr. Journ. Sci., vol. 22, 1906, p. 59. 



c See Rose, Beschreibung u. Eintheilung der Meteoritcn, etc, 1864, p. 77. ' .Science, vol. 30, 1909, p. 772. 



d Pogg. Asm. Phys. Chem., vol. 62, 1844, p. 449. ™ Troc. Wash. .\cad. Sci., vol. 2, July, 1900, p. 48. 



'Die Chemischer Natm Meteoriten, 1870, p. 146. " Tsch. Min. Pot. Mittheil. , vol. 2S, 1909, p. 110. 



/ .\mcr. Joum. Sci., vol. 36, 1863, p. 260. o Joum. Chem. Soo. London, vol. 27, 1874, p. 104. 



B Amer. Joum. Sci., vol. 37, 1864, p. 245. p Silz. k. .\kad. Wiss. Wien, vol. 47, 1863, p. 401. 



h .\mer. Joum. Sci., vol. 2, 1871, p. 13. t -\mer. Joum. Sci., vol. 19, 1855, p. 155. 

 * Records Geol. Surv. N. S. Wales, vol. 7, pt. 4, 1904, p. 305. 



