Lake Superior Iron

That tho iron manufactunng interosta if Michigan may be propérly shown, the Wyandotte Kolling Mili Oompany has eteoted t'ov exhibition at the State Fair and the Inter-State Exposition, to Vjo held soon in Chicago, specimens of the pvtnlucts of their milis, which were yesterday 011 exhibition at the coiupany's office in this city. The specimens were not manufactured especially tor the purpose of exhibition, but were taken trom tho producto of the milis as they are turned out day by day, and consist of píate and bur iron, chains, iails, and of nearly all articles which are in daily use. They havo all been exposed to the severest tests, with the view of showing the superior quality over all others of iron and stod manufacturad from the Lake Superior ores. A píate of flange, charooal-hainmered, iron, 224 by 72 inohes, ñ.1 nf au inch thiek, resisted a tust of 60,000 pounds to the squara inch, whioh is the beaviest test wüieh iron ot' any other manufacture has withstood. The plate is remarkable also for its great size, it being of sufficient length to form a complete section of the largest boilers. Acconipnnying this plate are two boiler heads, ninety-two inches in diameter. Mauy specimens were subuiitted to yarious experiments to prove the tensility, ductility Sud malleability of the Lake Superior irou and its superior quality in this respect. A bar of railroad iron was put under the hammer and bent, twisted and tortured until no resemblance to the original bar reinained. An effort was then made to hammer the head of the rail from the flange, but it proved unsuccessful. It must be understood the experiments were made wheu the iron was cold, which is the severest test to whioh iron can be subuiitted. The experiments with the chains were equally satisfactory and showed a marvelous power ot resist;uico. A Besseier steel chain 1 1-4 inches in thiokness, withstood a test of 121,850 pounds to the square inch. The following jomparisons will show the relativo tensility of Lake Superior and English iron, the trials having been made by the use of the testing machine made by Biehle, of Philadelphia, which is that used for all tests in which the government is concerned : A oue-fourth inch chain of American (Lake Superior) iron withstood a draft of 101,750 pounds, while a chain of English iron of the same size broke at a test of 76,500 pounds. _A five-eighth inch chain, American, 24,875 pounds ; iSnglisn, iy.uuu pouuus. three-fourth iuoh chain, American, 38,000 pound; Kngliah, 36,000; a one-half inch chain, American, 15,825.; Enghsh, 8,5000, and a seven-sixteenth inch chain, American, 10,250 pounds ; Euglish, 5,750 pounds. The company will also have on i-xhibi ion specimens of the various qualities of ore, and iron in the various stages of manufacture. - Vree Press.