Meteorites of loioa — Torrey-Barhour. 
67 
lY. The Winnebago Co. Meteorite.*' 
The Winnebago Co. meteorite fell near the new town of Thomp- 
son eleven miles northwest of Forest Cit}-, Winnebago Co., at 5:15 
p. m., Ma}' 2. 1890. Seven large fragments are noted, weighing 
respectively in pounds: 8G, iSQ^ 10, 10, 60 oz. , GO oz. , and, ac- 
cording to professor N. H. Winchell, about 5,000 small fragments, 
weighing from the fraction of an ounce to a pound or more. 
^^^^yr ^vMw\ YTy~..^^ Between two and 
^i(^^!i2». ^ '^ , ^ ^^'"^N. three hundred small 
v^^^^v'^^^^ "V •> V ^^^^ \\ fragments are in the 
M. ' -k-' ^^^^^^»"-A^ ^ ^ V\ collection of Yale Uni- 
i^ik^^Jj^^T'' s "^^^^^ \ ^"^^^^' A "^'crsit}' alone. About 
r j*^^ I^'^"^^^^^^^^^^^ "^J^*. "^1 P*^^i^^^ piece are in the 
1 a^ ' ^ A '^'\^ ^^^R^ ^^^' ^ I University of IMinneso- 
\ I f ^-^ M^^^L^ V ^^ '^ '^'^^ / ^^^ Ward and Howell, 
X^^r^f. ^^^'\ I ^ ^-1 / Rochester, X. Y., and 
Ni^\.|€^-),^\j ^^ ^ ' '^^^^ '^y ^^®*^- ^- Kunz, New 
N^^b .^ ' \ '' ^ ^^/ York. The dead black 
^^^^ v\\ ^ w v^ vu-b^^"^ scoriaceous crust when 
A microscopic section from the sixty-six pound ^^'Ok^^^ reveals a light 
Winnebago .stone, shoeing dark spider-like part- grev stone interspersed 
icles of iron distributed through tiie nu.tnx. ^.^^^ innumerable dark 
particles of iron, and globules of troilite, quite like the Iowa Co. 
•stones in appearance. Thin seams and cracks occur occasionally^ 
filled with a substance that has somewhat the appearance of 
graphite, and small spheroidal masses of olivine are abundant. 
Specific gravity, 3. 638. 
Chemical composition of the matrix from a fragment of the Q>^ 
pound aerolite : 
Silica 47.03 per cent. 
Iron o.\ide. 30.43 " " 
Oxide of ahiminium ;L!i4 " " 
Lime 17.."kS " " 
Magnesia 2.!H) " " 
99.94 " " 
This is )3ut the approximate composition, and it is our opinion 
that nothing else should be ottered, and that no anah'sis >-et pul)- 
lished is stiictly reliable owing to the non-homogeneous character 
^See Winnebago Co. Meteorites, Notes and analyses of the 104 pound 
stone. Science June 6, 1890. 
