N0.1.J RESEARCHES ON METEORITES— MERRILL. 11 



(3) Iron. — ^Mount Joy,Pa. Coarse octahedrite; brecciated. Previous analysis by Eakins" 

 yielded : 



Per cent. 



Iron 93.80 



Nickel 4.81 



Cobalt 51 



Copper 005 



Phosphorus 190 



Sulphur 01 



99. 325 

 Further tests for the minor constituents by Dr. Whitfield on a 50-gram sample yielded : 



Per cent. 



Chromium 0. 006 



Manganese 075 



Copper 008 



Chlorine 255 



Platinum '. Trace. 



No vanadium, molybdenum, tungsten, gold, silver, lead, or tin, nor in fact any other ele- 

 ment in amounts large enough to be determined by wet analysis, were found. 



(4) Iron. — PerryvUle, Mo. Described by Merrill * as belonging to Brezina's group of finest 

 octahedrites (Off) . As the entire iron was in possession of the National Museum, and it had not 

 before been described, all the necessary material was sacrificed for a very detailed analysis, with 

 the results tabulated below: 



Per cent. 



Iron 89.015 



Nickel 9. 660 



Cobalt 545 



Copper 025 



Manganese None. 



Phosphorus 365 



Sulphur 002 



Silicon 003 



Carbon 015 



Iridium 



Palladium 



Platinum 



Ruthenium 



Traces. 



99.63 



The amount of the rarer elements found in different samples of this iron was quite variable, 

 but always small. From one portion of 25 grams was obtained 0.004 gram of platinum and 

 from another portion of 100 grams weight but 0.0002 gram. The precipitates of ammonium 

 platinic chloride were in all cases faintly orange, indicating the presence of palladium but in 

 amounts too small for determination. In a 100-gram sample of the iron were found 0.014 

 gram of ruthenium and 0.028 gram of iridium, while another portion of equal weight yielded but 

 0.0009 gram of ruthenium and 0.0011 gram of iridium. 



So far as I am aware this is the first recorded occurrence of ruthenium in a meteoric iron. 

 The probable presence of iridium in the Toluca and Coahuila irons was recognized by Davison, 

 as already noted, but is not elsewhere recorded. No chromium, vanadium, molybdenum, 

 or titanium were found. 



The mineral schreibersite, constituting 2.61 per cent of the iron, was isolated and analyzed 

 with the following results: 



Per cent. 



Phosphorus 14. 00 



Iron 51.10 



Nickel 34. 13 



Cobalt 30 



99.53 



" Amer. Joum. Scl., vol. 44, 1892, p. 416. 6 Proc. U. S. Nat. Mus., vol. 43, No. 1M3, 1913. 



