On a Mass of Meteoric Iron. 
405 
tiallj surrounded the mass, that this furrow had penetrated 
much deeper than was suspected, and that the few scattered 
dark spots, like corrosions on the polished surface of the sec- 
tions, were the termination of the inner portions of this very 
furrow, part of the decay of which might be caused by the 
exposure and weathering the mass had undergone, in the five- 
and-thirty years of its existence on the surface of the earth ; 
the origin of the furrow being due to the lobulated arrange- 
ment of the mass. 
Impression of Etched Surface of the Meteoric Iron. 
Weight and Specific Gravity of each of the Sections of the 
Meteorite. — Dr Murray Thomson has furnished me with the 
following notes of the weight and specific gravity of the dif- 
ferent portions into w^hich the meteorite is now divided : — 
" I. Of the halves into which the iron was cut, one was 
rather larger and heavier than the other, and weighs : — 
In air, 18 lbs. 2 oz. 7 J drs. (Avoir.) 
In water, 15 „ 5 ,, 12J „ „ 
Its specific gravity is therefore . . 6*499 
" II. The smaller half, now broken into two portions, 
weighs : — 
1. The larger or pointed portion, 
In air, 7 lbs. 9 oz. 8J drs. (Avoir.) 
In water, 6 „ 7 „ 8 ,, „ 
Specific gravity, . . . 6*7400 
