124 FIELD CoLUMBIAN MusrtumM — GEo.oey, Vot. III. 
fresh. The completely encrusted individuals are of irregular, angular 
shapes, with angles slightly rounded, as is usual in meteorites. Sev- 
eral, however, show projecting spurs of toothed form which are unus- 
ual. No. 10, Plate XXXIX, is especially notable for these. The 
three views given of this individual show its orientation. The broad 
surface with rounded shallow pits was the rear side, the opposite the - 
front side. As shown by the side view, the individual is fragmentary. 
The individual found by the writer, shown in Plate XX XVIII, has 
a roughly tetrahedral form with one of the faces of the tetrahedron 
broken up into three planes. The faces are nearly all slightly concave 
and show only a few broad pittings. A marked feature of the surface 
is a whitish deposit occurring on several of the faces. This deposit is 
more or less streaked in appearance and the direction of the streaks is 
such that they would meet in a common point if produced. Exam- 
ined under a lens the deposit is seen to be a fine powder embedded in 
the interstices of the slaggy crust. Itissoluble without effervescence 
in hydrochloric acid but is so small in quantity that further determina- 
tion of its nature cannot be made. The simplest explanation of its 
origin would seem to be to regard it an efflorescence due to weathering, 
as the meteorite had been exposed five months to the elements when 
found. The uniformity of direction of the streaks is somewhat diff- 
cult to account for on this hypothesis, however. One of the upper- 
most faces, moreover, is entirely free from the deposit. The deposit 
lies on what was undoubtedly the forward portion of the meteorite in 
falling and the radiation of the streaks from a common point suggests 
that it was made during flight. In either case the phenomenon is new 
to the writer’s experience. The individuals shown in Plate XL were, 
as already stated, fragments when found, and no adjoining parts have 
yet been discovered in the vicinity so far as the writer is aware. The 
encrusted portion of one is seen to be deeply pitted, the pits varying 
in form and size on the different surfaces. On one surface they are 
abundant, small and uniformly distributed, on others fewer in number, 
larger and deeper. The complete individual was evidently of tabular 
form and about 2 inches (5 cm.) thick. One of the broad surfaces is 
remarkably flat and shows well-marked divergent lines of flow on the 
crust. The other individual shown in this plate illustrates the 
internal veins which occur in some specimens. These veins are 
evidently only armor faces produced by slipping. They are planoid 
in character and run in various directions which often intersect. 
The crust of most of the individuals is dull and coal-black in color, 
though of reddish tone in some individuals. Crackling of the crust 
into irregular polygonal areas is a common and characteristic feature, 
