304 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 



93 12' W. of Greenwich, near Mincy, Taney County, Missouri, 11 miles southeast of Forsyth, and over 60 miles from 

 Limestone Valley, Arkansas. Miss Payne also stated that about thirty years ago a meteorite passed over the boundary 

 line between Arkansas and Missouri and was supposed to have fallen near by. After considerable search it was believed 

 to have been located on a farm 11 miles southeast of Forsyth, whence it was taken 60 miles to a farm in Limestone 

 Valley, Newton County, Arkansas, on the supposition that it was of value. As it was decided not to be of meteoric 

 origin, however, it remained unnoticed for 28 years, except that a few gun sights were made from it by some of the 

 curious neighbors. A portion of it was sent to the writer and he at once secured the balance of the mass. It measures 

 34 by 35 by 29 cm. and at the smaller end is 12 cm. high. Its weight is 197 pounds (89.796 kg). It is similar to the 

 Hainholz, Westphalia, iron, is one of the Syssideres of Daubr6e and of the Logronite group of Meunier. Two large 

 crystals of olivine are present, one measuring 10 by 8 cm. and another 4 by 6 cm. ; this part being so much lighter in 

 color than the rest of the mass and so much more easily detached that the larger crystal has been almost entirely picked 

 out to a depth of 5 cm. At one corner of the mass there is an inclosure of augite measuring 7 by 4 cm. This is gray and 

 granular in structure and has all the appearance of a common gray pebble inserted in the iron. The surface of the 

 meteorite is deeply pitted and in many places traces of a black crust are still visible; the pitting measures 1 to 4 cm. 

 across. On one side a fungoid growth has slightly stained it green. Microscopic sections were made and in these it 

 was seen that the olivine did not occur in separate crystals, but rather in aggregations of irregularly-shaped grains 

 surrounded by brown ferruginous veins and with banded anorthite grains interspersed here and there. These aggre- 

 gations are full of black microlites, glass masses, and needle-shaped clear crystals, and are imbedded in the metallic 

 iron without any border of alteration. The boundary line is perfectly sharp, fresh, and distinct, in which characteristic 

 it differs from the meteorite of Powder Mill Creek. The olivine appears to be fresh, but is clouded with the brown fer- 

 ruginous stains abundantly scattered through it and between the grains. The following analyses were kindly furnished 

 me by Mr. J. Edward Whitfield and were made before its identity with the Newton County, Arkansas, meteorite was 

 suspected. He says: 



"The analyses of the metallic portion is as follows: 



Fe 89.41 



Ni 10.41 



Co 29 



P... .16 



100. 27 



"Of the rocky portion I have made an analysis of the whole part, i. e., not separated as soluble and insoluble but 

 with the metallic part separated. The analysis is as follows: 



SiOj 45.88 



Al 2 O a 7. 89 



FeO 19.73 



CaO 6. 02 



MgO 17.96 



NiS 1.67 



FeS... 0.54 



99.69 



"From the nickel and sulphur and iron we have the percentage corresponding to the formula (Ni,Fe)S, for the 

 troilite. 



"Taking the piece as it was received the specific gravity is 4.484. Of the finely ground rocky portion, free from 

 metallic particles as far as possible, I have made quite a number of analyses to learn the nature of the insoluble mineral, 

 and as far as I can judge it is enstatite only and the soluble part is a lime-iron silicate with considerable A1 2 O 3 . Of the 

 insoluble in dilute hydrochloric acid the following is the analysis: 



SiO 2 52. 39 = .87 



Al a 3 7.11 



FeO 14.68 = .201 



CaO 4.49 = .08 1.81 



MgO 21.33 = .53J 



100.00 



"Ratio of Si0 2 : R"O=. 87 : .81 which agrees pretty well with enstatite; but here the MgO is replaced by as much 

 FeO and the presence of A1 2 3 makes the ratio vary a little from the normal 1 : 1. Deducting all the S as NiS and the 

 Fe to correspond to the remaining S from the soluble part we have for the percentages of the soluble the following: 



Si0 2 26. 95 



A1 2 3 17.69 



FeO 35.98 



CaO 15. 98 



MgO 3. 40 



100.00 

 "The little MgO here probably comes from the slight solubility of the enstatite." 



