688 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
Nothing can be said about the associations of the other occurrence 
of chromite as only one small octahedral crystal was found among 
the residues derived from the treatment of many fragments. Unlike 
the mineral described above, it was nonmagnetic, with a jet black 
color and a brilliant luster. Its identity was established with the 
blowpipe. pea sek 
Another occurrence, probably belonging to the Canyon Diablo, but 
whose meteoric origin has not as yet been established beyond dispute, 
though all the evidence at hand points to such an origin, is the chro- 
mite found in the borings of hole 16% made at the Meteor Crater of 
Canyon Diablo. This mineral was jet black in color; had a bril- 
hant luster; was nonmagnetic; and occurred in small octahedral 
crystals and rounded grains. An analysis, after deducting 1.20 per 
cent of silica and recalculating, gave: : 
Cr.03 MER FE Mi I rs eda NEE EP EN LAN iia NAA is We RSL ge SAL Uh SUS ER Er LE 63. 40 
3 O52 Se toe Sep Dep Be CON oy Se Ae aaa EN. PEA SA) eG) 
FeO Dida ee rne CS sae ja SASS TENSES SO) 
UA Uf eal Tani caesar e Lee arae 3 oe peer os ee Ash Nat es SN a NODE 5. 00 
THE ALLEGAN METEORITE. 
Doctor Stokes ® found in his chemical work on this stone a small 
amount of chromite which contained titanium. The results of his 
analysis are: 
OT Oy sss CE. wie Rey ORLA TE SERS eaters Pt a eon AED OL sul 
Al:O; eS ee ea 2c ee Sens SP geen NaS ANI Bh ae 
EO ee a Nh Eee a Ri pe ne es a 28. 71 
MgO_____ asks Phen erence agonal : 2.76 
TiO: Beg aS ey ea zi mete ale eh 2) 
Separations made on a fairly large amount of the débris of this 
stone afforded me quite a quantity of chromite which was nonmag- 
netic and had a blackish-brown color. The results of my analysis 
were : 
(Gig Os AP ee Aah Ei EINES oa iM Ptah Se AES 56. 70 
AleO3__ it oie Ba Lean tity ieee Se Dea aa be eat) 
FeO os Seige aia Balas each Andee Reon aie DD (AO () 
MgO ___ aK g Rae e Sylaaall Lae dee sate ()() 
Di@s == eer os ie Bid ira gst cs (ear Aa ek Tea, Trace. 
The mineral was never in crystals but always in grains which under 
the microscope had the appearance of having been shattered. A con- 
dition that may be explained by the following statement of Doctor 
Merrill :° “ The general structure of the Allegan stone can, I believe, 
be accounted for only by regarding it as an agglomerate of chon- 
a@qG. P. Merrill, Smithsonian Mise. Coll., Quart., L, 1908, p. 447. 
6’ Proc. Wash. Acad. Sci., II, 1900, p. 48. 
€Tdem., II, 1900, p. 54. 
