122 On several Masses of Iron found in the Ancles. 
iron is malleable, hard to cut, its lustre is silver-white, its grain 
as fine as that of steel, forges rather indifferently, and is brittle 
when heated ; its specific gravity is 7.6 . 
7.18 grains gave Oxide of Iron, 9.46 
Oxide of Nickel, 0.75 
Residue insoluble in Nitric Acid, 0.02 
100 parts gave, Iron, - 91.23 
Nickel, - 8.21 
Residue, - 0.28 
The residue is insoluble in the nitric acid, and is hardly acted 
upon by the nitro-muriatic acid even in a state of ebullition. It 
seems to be composed of nickel and iron, and perhaps may con- 
tain a little chrome. 
Another mass, weighing 561 grammes, also found near Santa 
Rosa in the year 1810, is of a porous structure, malleable, very 
hard to file, with the metallic silver lustre, and its grain similar 
to that of fused steel. 
1.98 grains gave Oxide of Iron, 2.62 
Oxide of Nickel, 0.16 
100 parts, Iron, - - 91.76 
Nickel, - - 6.36 
We have traced the nickel in many other specimens, which 
were found with the preceding about the same time, in the vi- 
cinity of Santa Rosa; the largest weighed 145 grammes. But it 
is not only in the neighbourhood of Santa Rosa that iron has 
been met with in a metallic state. We shall therefore still 
mention two masses, which were discovered at some distance 
from the salt-mine of Zipaquira, at a spot named Rasgata. The 
one belongs to Mr Geronimus Torres ; it weighs 41 kiliogram- 
mes, is without traces of cavities, very malleable, of a structure 
composed of very minute planes, yielding with difficulty to the 
Hie, of a metallic lustre, and having its specific gravity — 7.6. 
4 grains gave Oxide of Iron, 5.23 
Oxide of Nickel, 0.40 
100 parts gave Iron, 90.76 
Nickel, - 7.87 
The other mass weighs 22 kiliogrammes, is very porous, almost 
spheroidal, a very malleable iron, of a foliated texture, and its 
silvery lustre gives it the aspect of certain irons, glossed with 
