292 FIELD CoLUMBIAN MusEUM—GEOLOGY, VOL. I. 
As individual grains they are, however, smaller in size. Often the 
nickel-iron and troilite can be seen to be intergrown in a single grain. 
Before the blowpipe a fragment of the rock fuses even in the oxidiz- 
ing flame with a fusibility of about 4.5, the entire fragment blackening 
from the formation doubtless of FeO. In the reducing flame the 
fusibility 1s, as would be expected, greater on account of a more rapid 
formation of FeO. Evidently the mixture of minerals forms an 

Fic. 3. Polished surface of Long Island meteorite showing size and distribution of metallic grains. 
Fully half of these are troilite. The light irregular lines mark the position 
of fractures of no significance. X ¥. 
aggregate fusible at a lower temperature than any of its components, 
for the component minerals are practically infusible. 
The specific gravity of the stone, determined as an average of 
three separate portions weighing 50, 18 and 7 grams respectively, 
IS 3.45. 
As previously stated, a description of the petrographic characters 
of the stone has been made by Weinschenk*, and as it seems desir- 
able to collect here all the important literature bearing on the mete- 
orite, a translation of Weinschenk’s article follows: 
‘¢From the Long Island, Phillips County, Kansas, occurrence I 
*POCN Ct 
