MARSHALLTOWN, a city and the county-seat of Marshall county, Iowa, U.S.A., near the Iowa River and about 60 m. N.E. of Des Moines. Pop. (1890), 8914; (1900), 11,544, of whom 1590 were foreign-born; (1910 census) 13,374. Marshalltown is served by the Chicago & North-Western, the Chicago Great Western, and the Iowa Central railways, the last of which has machine shops here. At Marshalltown are the Iowa soldiers’ home, supported in part by the Federal Government, and St. Mary’s institute, a Roman Catholic commercial and business school. The city is situated in a rich agricultural region, and is a market for grain, meat cattle, horses and swine. There are miscellaneous manufactures, and in 1905 the factory product was valued at $3,090,312. The municipality owns and operates its waterworks and its electric-lighting plant. Marshalltown, named in honour of Chief Justice John Marshall, was laid out in 1853, and became the county-seat in 1860. It was incorporated as a town in 1863, and was chartered as a city in 1868.
MARSHALSEA, a prison formerly existing in Southwark, London. It was attached to the court of that name held by the steward and marshal of the king’s house (see [Lord Steward] and [Marshal]). The date of its first establishment is unknown, but it existed as early as the reign of Edward III. It was consolidated in 1842 with the queen’s bench and the Fleet, and was then described as “a prison for debtors and for persons charged with contempt of Her Majesty’s courts of the Marshalsea, the court of the queen’s palace of Westminster, and the high court of admiralty, and also for admiralty prisoners under sentence of courts martial.” It was abolished in 1849. The Marshalsea Prison is described in Charles Dickens’ Little Dorrit.
MARSHBUCK, a book-name proposed for such of the African bushbucks or harnessed antelopes as have abnormally long hoofs to support them in walking on marshy or swampy ground. (See [Bushbuck] and [Antelope].)
MARSHFIELD, a city of Wood county, Wisconsin, about 165 m. N.W. of Milwaukee. Pop. (1890), 3450; (1900), 5240, of whom 1161 were foreign-born; (1905) 6036; (1910) 5783. It is served by the Chicago & North-Western, the Chicago, St Paul, Minneapolis & Omaha, and the Minneapolis, St Paul & Sault Ste Marie railways. It contains the mother-house of the Sisters of the Sorrowful Mother. Lumbering is the most important industry, and there are various manufactures. The city is situated in a clover region, in which dairying is important, and Guernsey and Holstein-Friesland cattle are raised. The municipality owns and operates the waterworks and the electric-lighting plant. The site of Marshfield was part of a tract granted by the Federal government to the Fox River Improvement Company, organized to construct a waterway between the Mississippi river and Green Bay, and among the original owners of the town site were Samuel Marsh of Massachusetts (in whose honour the place was named) and Horatio Seymour, Ezra Cornell, Erastus Corning, and William A. Butler of New York. Marshfield was settled about 1870, and was first chartered as a city in 1883.
MARSH GAS (methane), CH4, the first member of the series of paraffin hydrocarbons. It occurs as a constituent of the “fire-damp” of coal-mines, in the gases evolved from volcanoes, and in the gases which arise in marshy districts (due to the decomposition of vegetable matter under the surface of water). It is found associated with petroleum and also in human intestinal gases. It is a product of the destructive distillation of complex organic matter (wood, coal, bituminous shale, &c.), forming in this way from 30 to 40% of ordinary illuminating gas. It may be synthetically obtained by passing a mixture of the vapour of carbon bisulphide with sulphuretted hydrogen over red-hot copper (M. Berthelot, Comptes rendus, 1856, 43, p. 236), CS2 + 2H2S + 8Cu = 4Cu2S + CH4; by passing a mixture of hydrogen and carbon monoxide over reduced nickel at 200-250° C., or hydrogen and carbon dioxide at 230-300° C. (P. Sabatier and J. B. Senderens, Comptes rendus, 1902, 134, pp. 514, 689); by the decomposition of aluminium carbide with water [H. Moissan, Bull. Soc. Chim., 1894, (3) 11, p. 1012]; and by heating phosphonium iodide with carbon bisulphide in a sealed tube to 120-140° C. (H. Jahn, Ber., 1880, 13, p. 127). It is also obtained by the reduction of many methyl compounds with nascent hydrogen; thus methyl iodide dissolved in methyl alcohol readily yields methane when acted on by the zinc-copper couple (J. H. Gladstone and A. Tribe, Jour. Chem. Soc., 1884, 45, p. 156) or by the aluminium-mercury couple. It may be obtained in an indirect manner from methyl iodide by conversion of this compound into zinc methyl, or into magnesium methyl iodide (formed by the action of magnesium on methyl iodide dissolved in anhydrous ether), and decomposing these latter substances with water (E. Frankland, 1856; V. Grignard, 1900),
Zn(CH4)2 + H2O = 2CH4 + ZnO; 2CH3MgI + H2O = 2CH4 + MgI2 + MgO.