46 
masses have the form of rusty, porous nodules, and, owing 
to alteration, much resemble certain varieties of limonite. 
Group of Canon Diablo, Arizona, siderites, the largest piece 
weighing 198.5 pounds. Polished and etched specimens of the 
0 same^^> OnQ hun t 4 ¥ed«> pounds of the Kenton County, Kentucky, 
— " ^sid^rite. 
Case 2. — A large number of specimens of the Santa Catha- 
rina iron; etched specimens of the Joe Wright Mountain siderite; 
^ j ^^ewerrt y - thr - e e grams of the Lea iron, Tennessee; the Floyd Moun- 
tain, Virginia, iron. Specimens of the Butler, Mo., Dalton, Ga., 
Jenny’s Creek, Va .. Welland. Canada., aft 4 many other siderites. 
— ''^Cases 3, 3 A, and part of 4. — Aerolites, These are me- 
teorites made up largely of stony matter. The surface is usually 
black, smooth as if fused, and somewhat pitted. On breaking the 
thin black crust which covers the exterior, the interior is generally 
found to be of a grayish color, with scattered metalliferous parti- 
cles . Analy sis shows these meteorites to be made up largely of 
the ^li cates) olivin^ and other minerals of the pyroxene group 
>theif<w 4 th-sulphides and phosphides of iron. 
Case 3 and part of 4. — The aerolite of earliest date is 
that from Ensisheim, Germany, which fell in 1492: 26 grams 
are shown. Other interesting specimens are 200 grams of 
the stone from L’Aigle, France; 7 grams of the Bishopville, 
South Carolina, aerolite, remarkable for its light color and its com- 
position of nearly pure enstatite; about fifty stones of the Pultusk, 
Poland, fall; fragments of the carbonaceous meteorite from Entre 
Rios, Argentine Republic; and two fragments of the recently dis- 
covered Beaver Creek, British Columbia, aerolite. 
Case 3A. — Six hundred and nine aerolites of the Winneb ago 
County, Iowa, fall, varying in weight from a few grams eaeiffoTen 
^joui^. These stones fell over an area nine miles in extent at 
^ 5T30P. M., May 2d, 1890. Some of the specimens were found in 
a hay stack. They are each individually perfect aerolites. 
Case 3A (West Side). — Large slabs of the Farmington, 
Kansas, aerolite, which fell June 25th, 1890. Several masses of the 
Homestead, Iowa, aerolite. 
