. Guide leaflet. he Smithsonian [nstitution at Washington. Carleton, weighingpounds, had been removed to San Francisco the preceding year andwas afterwards deposited in the hall of the Pioneers1 Society in that i> classed a- a siderite, bul it- average composition shows the 32 [MERICAN MUSEUM GUIDE LEAFLETS presence of from 8 to 10 per cent of stony matter included in the nickel-iron, and the proportions of the mineral constituents vary considerablyin different parts of the mass. The nickel-iron is an alloy consistingof per cent iron, per cent nickel, per cent co
. Guide leaflet. he Smithsonian [nstitution at Washington. Carleton, weighingpounds, had been removed to San Francisco the preceding year andwas afterwards deposited in the hall of the Pioneers1 Society in that i> classed a- a siderite, bul it- average composition shows the 32 [MERICAN MUSEUM GUIDE LEAFLETS presence of from 8 to 10 per cent of stony matter included in the nickel-iron, and the proportions of the mineral constituents vary considerablyin different parts of the mass. The nickel-iron is an alloy consistingof per cent iron, per cent nickel, per cent cobalt and cent, copper, while the stony matter consists of olivine, carrying anunusual quantity of lime and associated with noteworthy quantities ofschreibersite and chromite. BRENHAM. (Siderolite.) Brenham is classed as a siderolite, but some of its fragments areentirely of nickel-iron. The etched section shown in the Foyer illustratesclearly the peculiar texture of the mass. The metallic portions consist. BRENHAM. Siderite (left) and Siderolite (right) in the same piece. of about 88 per cent, iron, 10 percent, nickel and 2 per-cent, other sub-stances. The dark green and glassy portions are crystals of olivine,which break out from the iron almost entire. HOVEY, THE FOYER METEORITES 33 The Brenham meteorite was found in the year l^s< scattered inmany pieces on the prairie in Brenham Township, Kiowa County, Kansas, over an area more than a mile in length. The fragments werehardly covered by the original prairie soil, and several of them wereprojecting through the sod. Nearly all were found by being struck bymowing machines, plows or other farm implements. The occurrence ofheavy rocks in a region where stones of any kind are a great raritywas a source of surprise to the ranchmen and led finally to the discoverythat they were ineteoritic in origin. About thirty fragments of the meteorite have been found, several ofwhich were used for many purposes about the ranches and h
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