METEORITES OF NORTH AMERICA. 471 



The amount of the last mineral was made out by chemical analysis. The nickel iron contains — 



Fe Ni Co Cu P 



86.18 12.02 0.91 0.04 trace =99.15 



The stony part treated with large excess of aqua regia gave a soluble part of 69 per cent, insoluble 41 per cent, 

 composed as follows: 



Soluble Insoluble 



Silica 34. 52 54. 02 



Protoxide of iron 30.01 18.10 



Magnesia 32. 50 23. 45 



Alumina 0. 43 2. 30 



Manganese 61 .36 



Soda (trace of potash and lithia) 89 1. 58 



Lime trace 



98.96 99.81 



The analysis clearly shows that the stony part of this meteorite consists of the usual mixture of olivine and pyrox- 

 ene minerals, the hyalosiderite predominating in the former and bronzite in the latter. 



Two minerals were detached in small quantities and analyzed separately. The first was a dark-colored mineral, 

 readily seen in small parcels and veins; this freed as far as possible from the adhering minerals was found to be soluble 

 in strong hydrochloric acid, and the prolonged action of this acid on the mineral, heated over the water bath, decom- 

 posed it very nearly completely. It is composed as follows: 



Silica 4g. 10 



Protoxide or iron 27. 20 



Magnesia 28,, 31 



Alumina 89 



Manganese 32 



Soda 1. 35 



Its solubility in hydrochloric acid and its composition clearly point it out to be of the olivine type. 

 The other mineral was found only on one part of my specimens, and there in the form of a white crystalline mass 

 not exceeding in weight 20 milligrams. It looked at first sight like enstatite, but there was sufficient difference in its 

 aspect to lead me to detach a few milligrams and test it, when I found it readily and completely soluble in hydro- 

 chloric acid, and as far as it was possible to decide on so minute a quantity it appeared to consist only of silica and 

 magnesia. Its solubility shows clearly that it is not enstatite, and I can only imagine it to be of the olivine type and 

 consisting entirely of silica and magnesia, occupying the same place among the unisilicates of the meteorites that the 

 enstatite does among the bisilicates. I simply note this fact here, not as giving any very definite results, but simply 

 that it may be looked into by those investigating these subjects. 



Wadsworth 3 gave a description as follows: 



The specimens purchased for the "Whitney collection from Ward and Howell show an ash-gray groundmass stained 

 with brownish spots of rust, and containing grains of grayish-brown olivine. 



The section shows a yellowish-brown and grayish groundmass containing iron. On one side a black band forming 

 the exterior (rind) of the meteorite is preserved. The groundmass is composed of olivine grains with some enstatite. 

 The yellowish-brown color is owing to a ferruginous staining of the silicates, while the rind is composed of the same 

 minerals as the interior, but owing to the heat to which it has been exposed it has been burned black. Clear grains of 

 untouched silicates (olivine and enstatite) are to be seen both in the interior and in the crust. 



In one corner of the section a small amount of fine ash-gray semibase was observed cementing olivine grains. 



The mixed enstatite and augite with iron and a ferruginous-stained groundmass are shown in a plate. 



Brezina 5 classified the meteorite as a brecciated crystalline chondrite, and described it as 

 follows: 



It is a stone of rather uneven structure, which outwardly is obscured by the somewhat extensive rusting of most of 

 the pieces. A still fairly fresh fragment of the Vienna collection shows the chondritic character. The principal piece, 

 of some 4 kg., shows this characteristic only indistinctly, on account of the progress of the rusting,Vhile on the contrary 

 the brecciated character is here very distinctly shown. Dark blue-gray particles alternate extensively with white, 

 quite like Weston. Occas onally these two sorts of particles border upon one another in large and quite level faces. 

 Nodules consisting of a mixture of troilite and nickel iron attain a size of 1 to 2 cm. In one place a nodule of 50 

 grams weight with hardened groundmass was found which contained many chondri broken in two and was covered with 

 a thick bark-like crust. 



The 5S-pound mass described by Shepard is in the Amherst collection. From other sources 

 about 30 pounds must have been obtained, as Wiilfing ° lists 15,786 grams distributed. 



