Iron Crown
a crown of gold set with jewels, made originally for the kings of Lombardy, and deriving its name from the fact that it inclosed within its round a circlet of iron, said to have been forged red from one of the nails used in the crucifixion of Christ. It was supposed to confer upon the holder sovereignty over all Italy. Napoleon I. was crowned with it at Milan on May 26, 1805.
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Iron Furnace
A furnace in which some operation connected with the manufacture of cast iron, malleable iron, or steel is conducted; as cupola, smelting, reverberatory furnaces, etc. The several furnaces employed for this purpose will be found described in their regular order.
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Iron Gate
in geography, a celebrated defile in the valley of the Danube. As the river passes southward out of Hungary it forces its way in a series of rapids through a narrow, rocky gorge, a mile and one-half in length. A canal has been constructed to enable vessels to pass through the Iron Gate. A railway also follows the water's edge. See Danube ; Belgrade
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Iron Gate of France
a name for the town of Longwy, a fortress of France on the Belgian frontier. Louis XIV. gave it the name.
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Iron Hand
THE. See BERLICHIN- GEN, GOETZ VON.
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Iron Mountain
a county-seat of Dickinson co., Mich.; on the Chicago and Northwestern, the Chicago, Milwaukee and St. Paul and the Wisconsin and Michigan railroads, 50 miles N. W. of Escanaba. It derives excellent water power from the Menominee river; is the trade center for miners of Dickinson county and the adjoining farming section in Wisconsin; and is almost wholly engaged in iron mining. The city has several daily, weekly, and monthly periodicals, and a national bank. Pop. (1910) 9,216; (1920) 8,251.
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Iron Stone
a "stone" or mineral into the composition of which iron largely enters.
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Iron-lustre
Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
This lustre is obtained by dissolving zinc in muriatic acid, and mixing the solution with spirit of tar. To be applied on the surface of the iron.
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Iron-statue Moulding
Moulding statuary in iron. This branch of the art is necessarily more difficult than any other of the processes followed for the production of statuary in bronze, because the materials used for moulding with are less rigid, and demand more skill in their manipulation as a consequence. The core is built by the moulder, on which the sculptor carves his model in clay or wax, after which the moulder builds his cope around it in sections; the latter, when sufficiently hardened, are lifted away, the thickness removed, and the whole mould finished, dried, closed together, and cast like any other ordinary piece of loam-work. See STATUE-FOUNDING.
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Irons
shackles, fetters, or bilboes: for the feet, especially such as are used on board ship.
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Ironton
a city and county-seat of Lawrence co., O.; on the Ohio river, and the Cincinnati, Hamilton, and Dayton, Detroit, Toledo and Ironton and the Norfolk and Western railroads; 127 miles S. of Columbus. It contains a Memorial Hall, Masonic and Odd Fellows' Halls, city hospital, Briggs Public Library, Kelley and Riverview Parks, electric street railroad and lighting plants, Holly system of waterworks, National banks, and manufactories steel, nails, and other commodities. The city is the mining, manufacturing, and farming trade center for a region within a radius of 30 miles, and is at the base of a range of lofty hills containing large deposits of iron ore and bituminous coal. Pop. (1910) 13,147; (1920) 14,007.
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Ironwood
a name given to various trees from the quality of their timber. The ironwood or hop - hornbeam of America (Ostrya virginica), order Cupuliferæ, is a tree with a trunk not exceeding six inches in diameter, with very hard wood, so heavy that it sinks in water, and foliage resembling that of birch. The species of the genus Sideroxylon, known as ironwood, are natives of the tropics and also of New Zealand, the Cape, etc. The S. inerme, or smooth ironwood of the cape, has long been cultivated in the greenhouses of Europe. Diospyros Ebenum (the ebony) is also named iron wood, as is the Metrosideros vera of Java.
a city in Gogebic co., Mich., on the Chicago and Northwestern and the Minneapolis, St. Paul and Sault Ste. Marie railroads; 39 miles E. of for Ashland, Wis. It is the trade center the famous Gogebic iron region. Here is the Norrie Mine, once the largest producer of iron ore in the world, and there are also other large mines. The city has a National bank, trolley line connecting with Hurley and Gile, Wis., weekly newspapers. Pop. (1910) 12,- 821; (1920) 15,739.
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Irony
a kind of ridicule which exposes errors or faults by seeming to approve, adopt, or defend them. The Socratic irony is employed in argument one speaker affects to take the when positions of the other for granted, in order adroitly to lead him into self-contradiction or obvious absurdity. Veiled sarcasm is a brief modern definition of irony.
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Irrational
in mathematics any quantity which cannot be exactly expressed by an integral number, umber, or by a vulgar fraction: thus V 2 is an irrational quantity, because we cannot write for it either an integral number or a apvulgar fraction; we may, however, proximate to it as closely as may be desired. In general, every indicated root of an imperfect power of the degree indicated is irrational. Such quantities are often called surds.
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Irrigation Dam
KING'S RIVER IRRIGATED CANTELOUPE FIELD IRRIGATED ONION FIELD IRRIGATED SUGAR CANE, AUSTRALIA List of Illustrations LINCOLN MEMORIAL - Colored Frontispiece Opposite page 260 GOVERNOR'S PALACE, KINGSTON, JAMAICA, FUJIYAMA, JAPAN CRYPTOMERIA TREES, NIKKO, JAPAN JERUSALEM FROM THE MOUNT OF OLIVES VIA DOLOROSA, JERUSALEM WAILING WALL, JERUSALEM DAMASCUS GATE, JERUSALEM TEMPLE EMMANU-EL, NEW YORK Opposite page 356 STATUE OF EMPRESS JOSEPHINE MARBLE QUARRIES, ITALY THE RAMPART ICEBERG JUAN FERNANDEZ ISLAND TOWN ON THE GARDA SEA, ITALY STEEL BARGES AT KANSAS CITY THE KLONDIKE TRAIL DOCKS OF LIVERPOOL, ENGLAND Opposite page 484 EMANCIPATION GROUP BY BALL MEETING OF LINCOLN'S CABINET MEMBERS OF LINCOLN'S CABINET HOME OF LINCOLN AT SPRINGFIELD MEMORIAL OVER LINCOLN CABIN STATUE OF LINCOLN BY BARNARD STATUE OF LINCOLN BY BORGLUM STATUE OF LINCOLN BY ST. GAUDENS 1 INDIA INDIANA JOWA List of Maps JAPAN KANSAS KENTUCKY AND TENNESSEE "HERRICK-LOM" iii
KING'S RIVER, FRESNO CO., CALIFORNIA. THE INTAKE GATE IS AT THE LEFT AND THE RIVER AND DAM AT THE RIGHT Underwood & Underwood IRRIGATION IN THE IMPERIAL VALLEY, CALIFORNIA. A FIELD OF CANTALOUPES Underwood & Underwood Photo Brown Bros.
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