W. P. Blake — Meteorite from Green County, Tenn'. 41 



sometimes very abundantly, and produce a curiously mottled, 

 rock which is striking in appearance. These hornblende 

 crystals are themselves filled with inclusions of the other con- 

 stituents, just as are the irregularty shaped hornblendes of the 

 hornblende-peridotite. (Specimens No. 94 from Stony Point 

 and No. 121 from the center of Cortlandt township.) 



The rocks treated of in this paper, though all non-feldspathic 

 and olivinitic and hence properly coming under the defini- 

 tion of peridotite, are very closely allied to a large and impor- 

 tant group in the Cortlandt Series from which both feldspar 

 and olivine are absent. Especially on the northern side of 

 Montrose Point curious and unusual massive rocks occur, com- 

 posed only of augite, diallage, hypersthene, brown hornblende 

 and a little biotite. These constituents are present in every 

 conceivable size and proportion. Professor Dana has designa- 

 ted these rocks as hornblendytes and pyroxenytes.* The 

 writer hopes to communicate the results of a microscopic study 

 of them, together with the gabbros and norites of the Cortlandt 

 Series, in a later paper. 



Petrographical Laboratory of the Johns Hopkins University, Oct. 15, 1885. 



Art. V. — Description of a Meteorite from Green County, Ten- 

 nessee ; by Wi. P. Blake. 



The meteoric iron, of which the following is a description, 

 was found by a farmer ploughing his field, in Green County, 

 Tennessee. It was completely buried in the earth and there is 

 no knowledge of the time of its fall. In the year 1876 it was 

 sent by General J. T. Wilder with the minerals of Tennessee 

 to the International Exhibition at Philadelphia, and has since 

 been in the writer's collection at New Haven. The weight of 

 the mass is 290 pounds, equivalent to 639 '36 kilograms. The 

 original weight is said to have been 300 pounds. It has been 

 lessened by small portions cut from the ends of the iron and 

 by exfoliation. 



The form of this iron is its most striking visible peculiarity, 

 being an extremely regular long ellipsoid, tapering at each end 

 to a flattened point, but having throughout its length an ellip- 

 soidal section. It has been compared in shape to a flattened 

 cigar. The form and general appearance of the mass are, how- 

 ever, shown by the accompanying illustrations. Figure 1, a 

 top view of the broadest surface, from a photograph, and figure 

 2 an outline of the side view. 



The dimensions of this meteorite are: 



*This Journal, Sept., 1880, pp. 197, 198. 



