416 Proceedings of the Royal Physical Society^ 
iron, nickel, carbon, and silica ; and these are present in the 
following proportions per cent, : — • 
Iron, .... 93.51. 
Nickel, .... 4-86. 
Silica, .... 0-91. 
Carbon, , . . . 0-59, 
99-87. 
It will be seen, therefore, that its composition is very 
simple, but at the same time not unlike that recorded in the 
analyses of other masses of meteoric iron. The occurrence of 
nickel in it, in such marked quantity, sets at rest any question 
that might be raised as to its meteoric origin. Though one 
or two pieces of undoubted meteoric iron exist without any 
nickel in their composition, yet that metal is held by Shepard 
{vide Silliman's Journal, ut sup.) to be the second most fre- 
quently occurring constituent. 
[After the above communication was written, and as a por- 
tion of the mass had been cut into pieces of various sizes, an- 
other opportunity was had of taking the specific gravity of a 
slice (separated into two portions), embracing the whole thick- 
ness of the mass. These pieces being more manageable for 
the purpose of taking density, it is to be presumed that the 
following numbers express, with the utmost accuracy, their 
specific gravity : — = 
Slice from the pyramidal or pointed portion gave, 6*750 sp. gr. 
„ rounded or lobed „ 6*350 „ 
It was also noticed, in examining a small portion of the 
first of these slices, where the metal was corroded-looking, and 
showed various black spots on its surface, that this iron was 
very brittle ; so much so, that no difficulty was experienced 
in reducing a fragment of it to powder in an iron mortar. 
I would likewise here record, that a further chemical ex- 
amination was made, chiefly in search of magnetic oxide of 
iron, which is so frequently a constituent of meteorites, but, 
as before, I could obtain no evidence of the existence of this 
substance. 
