126 FreLp CotumBIAN Museum — Geovoey, Vot. III. 
the meteorite was obtained by Jackson, was at that time located along 
Ponca Creek in Nebraska. It seems reasonable to suppose that the 
meteorite was found in the vicinity of this creek, and the name Ponca 
Creek has the additional advantage of containing that of the tribe by 
some member of which the meteorite was probably originally found. 
For the meaningless name Dakota, therefore, that of Ponca Creek 
may well, in the opinion of the writer, be substituted. _ 
SALINE. 
Some further observations may here be added to the brief account 
of this meteorite given by the writer in 1902.* The approximate 
place of find of the meteorite was kindly indicated to the writer by Mr. 
S. A. Sutton, and this is shown in Plate XLI. No other observations 
of the fall than those already made by Mr. Sutton and reported by the 
writer seem to be known. The shape of the meteorite may be de- 
scribed as approximately that of a truncated, four-sided pyramid. 
_ The base of the pyramid, shown in Plate XLII, was plainly the rear side 
of the meteorite in falling. It is the broadest surface of the mass, and 
has an area of about 144 square inches (goo sq. cm.). In outline it is 
roughly circular. Mr. Sutton states that this was the surface on which 
the meteorite rested when found, but this position could have been 
brought about by an overturn when striking. It was more heavily 
coated with carbonate of lime when received at the Museum than any 
of the other surfaces. It is nearly flat, though slightly concave, and 
shows the broad, shallow pits characteristic of these surfaces of meteor- 
ites. On the opposite side of the meteorite a surface having the form 
of along and narrow isosceles triangle runs nearly parallel to it and 
the thickness of the meteorite between the two surfaces ranges from 
7 to 8 inches (18 to 20 centimeters). From the parallel surface the 
meteorite slopes away at angles of 40°, 50°, 60° and go° approximately. 
Three of these surfaces are approximately plane, the others are 
rounded. A view of the meteorite showing this feature is given in 
Plate XLII. Views of the mass from two other sides were published 
in the Catalogue of Meteorites of the Museum.t The plane surfaces 
show practically no pits, the others are more or less irregularly pitted. 
The more symmetrical of these pits are oval in form, from % to 34 
inches in their longest diameter and have a depth about one-fourth as 
great. All the edges produced by the meeting of different surfaces of 
the meteorite are rounded. 
* Science, N. S..Vol. XVI, pp. 67, 68. 
} Pubs, Field Col. Mus. 1903, Geol. ser. Vol. II, Plate XXX. 
