4 FIELD COLUMBIAN MustuM—GEOLoGy, VoL. III. 
of an inch, and rejecting the drillings from the crust portion. For 
the determination of iron, nickel, and cobalt, a portion of 1.3733 
grams was dissolved in strong hydrochloric acid. Solution took 
place rapidly and completely, only a few unweighable black flecks 
being left after oxidation with nitric acid, evaporation to dryness 
and addition of water. Iron was precipitated three times by treat- 
ment with ammonia and ammonium chloride as directed by Frese- 
nius, except that a large excess of the reagents was used. After 
solution with sulphuric acid and reduction with hydrogen sulphide, 
the determination was made by the usual titration with potassium 
permanganate. Copper was precipitated by hydrogen sulphide from 
the filtrate from the iron precipitate and then determined electro- 
lytically. Nickel and cobalt were separated in acetic acid solution 
as sulphides and separated by potassium nitrite. Nickel was then 
determined electrolytically, but cobalt as sulphate, the electro- 
lytic determination of this element having proven at times unreliable. 
Manganese was tested for in a portion of 2.8248 grams dissolved in 
nitric acid and oxidized with potassium chlorate according to Ford’s 
method. No precipitate was obtained. The treatment with nitric 
acid showed the meteorite to be passive until water was added. 
Sulphur and phosphorus were determined in a portion of 4.8321 
grams dissolved in fuming nitric acid by the slow addition of hydro- 
chloric acid. From this sulphur was precipitated as directed by 
Blair when iron is present, purified by fusion with sodium carbonate, 
and weighed as barium sulphate. Phosphorus was determined by 
the acetate method and weighed as magnesium pyrophosphate. 
Carbon was determined in a portion of 2.5678 grams by oxidation 
with chromic and sulphuric acids and weighed as carbon dioxide. 
During the treatment the odor of hydrocarbons was observed, similar 
to that obtained in the solution of pig iron. This indicated that 
some of the carbon was present in a combined form, while an insoluble 
residue showed that some existed as graphite. The analysis gave the 
following results: 
| SAT MOMS Ue CMG ee Neyo 89.84 
i AEN CET A a 8.79 
Oo eee er aa er Cl  E ER re 0.28 
Chee ia ice civcaiess Sialece oh peep Me Rees te ane eee en 0.07 
Price gle ee ie ee ee eee a 0.80 
Se doa gaaia i elh Gueusis. o level Soe CURee alg eke otek een ep ee 0.02 
Ore es ETN A I FR 0.09 
99-89 
The composition of the meteorite is thus seen to be that usual to 
medium octahedrites, with a high percentage of phosphorus. From 
