W. E. Hidden—Mazapil Meteoric-tron. 225 
the striz of flow, as seen on meteorites whose fall has been 
observed. In eleven places nodules of graphite are noticed 
extruding from the surface (the engraving shows some of these), 
one of them is nearly an inch in diameter. ‘he graphite is 
very hard and apparently amorphous; troilite and schreibersite 
were noticed on a section cut off for analysis and for the 
development of the figures of Widmanstitten. Tle crystalline 
structure (fig. 2) is_ well 2. 
shown in the engraving | 
(Ives’ process) which is of 
natural size. The lines are 
somewhat similar to those 
of the Rowton iron, in their 
width and distribution, and | 
are very unlike the known 
Mexican irons from Toluca, 
Durango, Coahuila, ete. 
In its surface and general 
flatness, the mass bears a 
remarkable resemblance to Section of Mazapil Meteoric Iron 
the Hraschina, Agram iron* (natural size.) : 
which fell May 26th, 1751. In its weight it is nearly like the 
Trons of Rowton (7 lbs.), Charlotte (94 lbs.), Victoria-west (6 
Ibs. 6 oz.), and Nedagolla (92 Ibs.), which were all seen to fall. 
Mr. J. B. Mackintosh has kindly analyzed a small fragment 
with the following results, which, for comparison with other 
irons, seen to fall, I have placed in tabular form :— 
Mazapil. Rowton. Charlotte. Estherville.+ 
Mackintosh. Flight. Smith. Smith. 
ronpssae oes 91°26 91°25 91°15 92°00 
Nickels: 7°845 8°582 8°05 7°10 
Wobalt. 22452 0°653 0°371 0°72 0°69 
Phosphorus ~~ ‘0°30 apse 0°06 07112 
100°058 100°203 99°98 99°902 
Carbon is distributed all through the iron between the crystal- 
line plates, and it is noteworthy that this element was observed 
with the spectroscope as present in the “‘ Bielids”’ of Nov. 27th, 
1885. Chlorine is also present and shows itself by a slight 
superticial deliquescence. Of this latter I will state that most 
of the surface oxidation of the ferrous chloride has occurred 
since August last. As yet no tests have been made to ascer- 
tain the amount of occluded gases, or to analyze the graphite 
nodules, and it is probable that such analyses give only results 
* See Beytrage zur Geschichte und Kenntniss meteorischer Stein- und Metal- 
massen, by Dr. Carl von Schreibers, Wien, 1820, plate VIII. 
+ Fell May 10, 1879 and contains embedded nodules of nickeliferous iron sur- 
rounded by silicates. 
SS 
