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 ‘‘ wu/stige”’ (swollen). 
The longest one on the etched surface figured accompanying is 11 
mm. (5@) of an inch in length and its contour is very irregular. Only 
the two alloys kamacite and tenite 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 toa 
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 Y%-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. 
