W. J. Taylor on Meteoric Iron from Mexico. 375 
lichsten Bergwerke. Reviere de Mexico 1804, p. 192 and 288. 
Chladni (U. F. M. 8. 336) Partsch, (D. M. s. 99. 
In the examination made by M. Berthier he failed to detect 
the presence of cobalt, but it is mentioned by Prof. Clark that 
Manross had found it in a specimen from the cabinet of Prof. 
Wohler; my examination confirms that of Mr. Manross. 
To the kindness of W. 8S. Vaux, Esq., I am indebted for the 
material for this investigation; Mr. Vaux has in his magnificent 
cabinet the principal portion of a mass which weighed over ten 
pounds. It was originally about six inches long, with an aver- 
age diameter of three inches; the lump was oblong with rounded 
ends, the whole being covered with a thin crust of limonite. 
| A cross section cut from this lump has been carefully polished 
and etched by strong nitric acid, which gives a most beaut 
surface of about three and a half inches in length, by two and 
a half in breadth, covered with the greatest complexity of wid- 
mannstattian figures which almost mee description. ; 
e surface is crossed by bands about one-tenth to one-six- 
teenth of an inch in breadth; these apparent bands are cross 
sections of different planes, as is readily perceived by their dif 
ferent refractive “atl 
the 
to have been about an inch in diameter: it was in part 
oir aeaaed eas Iminera 
sufficiently pure for the determination of its specific gravity and 
analysis, dn dissolving it in hydrochloric acid, thin lamin of 
schreibersite separated with minute portions of chromic iron. 
Through the kindness of Dr. F. A. Genth, I have been per- 
oe ‘g make the following a in his laboratory : 
yrrhotine dissolved in nitric acid, gave— — 
No.1. : : é - 83°76 per cent. 
: mee _ 57-95 silag 
won, * x : : 4 ¢ 
ee ee eC 
bal = 
t, : ‘05 ‘“ 
oon, . : 96 
Phosphorus, -_ ° : ee 
