440 W. M. Foote — Shower of Meteoric /Stones, Arizona. 



show the mineral to be essentially sulphide of iron. It may 

 therefore be provisionally classed as pyrrhotite. 



No tendency toward any one fraginental form is observable 

 except that the stones with well-marked fusion flow are 

 generally of a roughly pyramidal or conical shape, the apex cor- 

 responding with the radiant point of the fusion lines; the base 

 is the back of the individual in flight. 



According to a local account, the rust noticed on a few stones 

 was caused by rain between the falling and finding of the speci- 

 mens. On these is observable the usual liquid exudation of moly- 

 site (ferric chloride, FeCl 3 ), the alteration of lawrencite (ferrous 



Fig. 10. 



Fig. 10. Piezoglyph formed by burning out of pyrrhotite nodule, 

 x 0'T7 diameters. 



chloride FeCl 2 ). The remainder of the thousands of individuals 

 examined seemed to be entirely stable and bear no signs of 

 disintegration. On many pieces are traces of the sandy red- 

 dish soil on which they fell. Two or three per cent showed a 

 " soil line" (fig. 12) indicating clearly the depth of burial. A 

 very few showed traces of the soil on all sides. This is, of course, 

 not a reliable indication of the average depth of burial, since 

 the amount of cleaning done by the finders cannot be deter- 

 mined. The direction of this soil line, shown in fig. 4, would 

 indicate that the angle of fall with the earth's surface was 

 about thirty to forty degrees. From the slight penetration of 



