B. Silliman—Meteorte Iron from California. 21 
larger, and there are only five elements found, in place of twelve 
in the California iron. 
The following analysis was made upon the clean shavings 
cut from the entire surface of the section by the planing tool, 
thus securing a perfectly fair average sample. The analysis 
was made by Mr. F. A. Cairns, assistant in the School of Mines, 
Columbia College, whose constant devotion to the analysis of 
iron gives to his work on this metal great trustworthiness.* 
Analysis. 
81°480 Calcinip -.- ....+ 0°163 
Ly Teenie 17°173 Carbon) ota 0°071 
see eats OE 0°604 pos LT Rai 0°032 
Aluminium .._-. 0°088 Phosphorus - - - -- 0°308 
Chromium -. -- -- ers Sulphur --....-- 0°012 
Magnesium - ---- Potassium .-.--- 0-026 
010 
"Total, .---99°987 
Of the twelve elements quantitatively determined by this 
analysis, aluminium, calcium, and potassium have been rarely 
observed in meteoric iron—meteors free from silicates—while 
the absence of copper, tin, manganese and sodium will be 
noticed. 
No room is left, it will be observed, by this analysis for any 
notable shanty of occluded gases, for which no search w 
consequently m 
The plan of analysis adopted by Mr. Cairns was as follows 
For nickel, cobalt, aluminium, magnesium, calcium 
silico: mn grams W 
— ed in in hydrochloric atid and chlorate of potassa, and the pea eae 
In the fil flfeste, the iron and alumina were removed by double ene nag ag by 
tate of soda, and the alumina determined by fusion in silver with pure soda, etc. 
: akacd 
te 
dheceat ate portion of the sample, volumetrically. 
lute mium Bie determined in the residue of 20 grams, insoluble in cold di- 
hydrochloric ac 
The carbon was determined by dissolving 10 grams of iron in neutral sulphate 
ri 
Or " AO, 
he spa phosphorus and sulphur, 10 grams were dissolved in hydrochloric acid 
divi orate of potassa, and e evaporated to extract silica. The solution was paney 
be a one Half the as precipitated by chloride of bari 
i. the other sR the phosphoric acid was detormeal by molybdate a 
The a, after expelli chlorine, as us 
alkali potas was determined in 10 grams of of the iron by the usual process for 
€8; dissolving, precipitating by baryta, ete 
