May, 1902. Meteorite Studies, I — Farrington. 307 



width nor do they extend continuously for any great distance. They 

 are of the type described by German writers as ** wulstige" (swollen). 

 The longest one on the etched surface figured accompanying is n 

 mm. (54) of an inch in length and its contour is very irregular. Only 

 the two alloys kamacite and tsenite seem to be present. The former 

 is iron gray in color and occasionally has a well-marked granular 

 structure. The latter, filling the areas between the kamacite bands, is 

 now more or less ribbon-like and now occurs in curvilinear areas. 

 Much of it appears connected through the section, giving the impres- 

 sion of a network in which the kamacite is imbedded. It shades to a 

 bronze color as contrasted with the iron gray of the kamacite and is 

 left standing in relief by the etching. Under the lens its surface 

 appears very rough, the etching of the acid acting upon it more irreg- 

 ularly than upon the kamacite. The only other mineral appearing in 

 abundance in the meteorite is schreibersite, which occurs in long 

 narrow bands or in irregular star-like forms. These areas are 

 bounded by kamacite (swathing kamacite). Decomposition has taken 

 place usually along the schreibersite bands, and these decomposed 

 areas appear as dark marks on the etched surface. 



Troilite seems to be almost entirely absent from the meteorite. 

 Only two minute nodules are to be seen on the surfaces which have 

 been etched and the percentage of sulphur obtained by analysis cor- 

 responds to a content of only 0.07%. The presence of cohenite is 

 indicated by the carbon found by analysis, but it was not observed on 

 the etched surfaces. 



An analysis of the meteorite was made by Mr. H. W. Nichols, 

 the methods employed being briefly as [follows: Material for the 

 analysis was secured by a boring made with a ^-inch drill. The 

 amount of substance used was 2.4353 grams. In order to prevent 

 loss of sulphur and phosphorus the borings were placed in a flask 

 and first treated with fuming nitric acid, to which they remained pas- 

 sive, and then hydrochloric acid was gradually added cold until solu- 

 tion was complete. Sulphur was weighed as barium sulphate. Phos- 

 phorus was determined by Eggertz's method as phosphomolybdate, 

 the quantity being too small to allow of a magnesium pyrophosphate 

 determination. Iron was separated by one ammonia and three basic 

 acetate and one final ammonia precipitation. Manganese was sepa- 

 rated by the sodium acetate method. Copper, cobalt and nickel were" 

 precipitated as sulphides in acetic acid solution, cobalt and nickel 

 separated by potassium nitrite and all weighed from electrolytic depo- 

 sition. Carbon was determined in an independent sample by oxida- 

 tion in chromic acid after the method described by Blair.* 



♦The Chemical Analysis of Iron, 3rd edition, p. 136. 



