1887.] NEW YORK ACADEMY OF SCIENCES. 145 



is one crystal and the exposed part is only one side of it. In 

 some cases where the nodules were broken they Avere found to 

 be iridescent. This is one of the octahedral irons showing the 

 Widmanstatten figures beautifully on etching, and is one of the 

 Caillite group of Stanislas Meunier and of the mittJere lamellen 

 of Brezina. The lamellfB are 1°"" wide and the markings more 

 closely approach the Eowton ^ and Mazapil irons. The specific 

 gravity of the small piece figured is 7.773. Troilite, as before 

 stated, is very abundant in the mass. Schreibersite and carbon 

 have also been found between the lamina?. Chloride is present 

 only in slight quantity, as scarcely any deliquescence has been 

 observed. 



The following is a comparative table of analyses of meteoric 

 irons most nearly approaching this in composition: 



Cabin Creek. Estherville. Mazapil. Rowton. Dickson Co, 



(Whitfield.) (Smith.) (Mackintosh.) (FUght.) (Smith.) 



Iron 91.87 93.00 91.26 91.25 91.15 



Nickel 6.60 7.10 7.845 8.582 8.05 



Cobalt trace 0.69 0.653 0.371 0.72 



Phosphorus.. 0.41 0.112 0.30 0.06 



C,S, etc 0.54 



99.902 100.038 100.203 99.98 



99.42 



From the fact that the ridged side is so free from crust and the 

 flat side so thickly coated ; that the ridged side is covered with 

 strige and marks of flowing, and the other has so few marks of 

 this kind; and from the fact that at the edges, especially at the 

 indentation, the back looks as though a flame had come from the 

 other side — from all these facts the writer concludes that after 

 entering our space the iron traveled with the ridged surface 

 forward, the iron burning so rapidly as to be torn off, leaving 

 part of the surface bright. The flame thus passed over the 

 sides, and the indented edge being downward, the flame was 

 driven upward as the iron advanced. On the flat side, not being 

 so much exposed, the iron was not so completely consumed, 

 hence a crust and hirge but shallow pitting?. These conditions 



'"Meteoriten Sammlung des k. k. mineialogisches Hofcabinet in 

 Wien." 8vo, Wien, 1885, plate 2, figure 2. 



