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MEFEORITE STUDIES. 
BY 
OLIVER CUMMINGS FARRINGTON. 
BATH FURNACE. 
Of the three known stones of this fall, one-half the smallest one, 
weighing 223 grams, came into the possession of the Museum (Mus. 
No. Me 570). This individual is of irregular disk-like form, of 
2% x 1% x % inches.dimension. A side and front view of it are 
shown in Plate XXIX. Though its shape indicates that it was a scal- 
ing, it was completely encrusted and shows orientation. One of the 
broad surfaces was plainly the front side, the opposite the rear side. 
The front side shows lines of flow radiating from an eccentric point. 
These lines have under the lens the form of ridges of inverted V shape 
gradually branching and tapering out. These ridges are of shining 
black glass and rise above a dull-black ground. The interior sub- 
stance of the meteorite is gray with rusted spots about the metallic 
grains. Itis of sufficiently firm texture to take a good polish. Under 
the microscope the crust is seen to be relatively thin, .2-.3mm. The 
zones of Tschermak are indicated, butare by no means well marked. 
For the most part the crust appears as a black, opaque aggregate bor- 
dering the edge of the section, with here and there transparent grains 
of various sizes seen in polarized light to be unaltered olivine. The re- 
mainder of the section appears in ordinary light a confused mass of 
transparent grains considerably iron stained and interspersed with 
metallic grains of very irregular but usually elongated shapes. Among 
these troilite is more numerous than nickel-iron. An opaque, black 
substance also occurs in small quantity connected here and there with 
the metallic grains. It may be of ferrous or carbonaceous nature..- 
Chondri are but occasionally and imperfectly outlined. In polarized 
light the chondri can be more readily recognized. They are not nu- 
merous, however, the greater part of the section being made up of an- 
hedral grains of various sizes. Chondri where visible are for the most 
part sharply outlined from the surrounding mass. Those composed 
of alternate lamellze of olivine and glass are the most common and 
next in number are those composed chiefly of fibrous enstatite. Large 
Tare 
