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Macomb – Magnetic Equator

Macomb

city in McDonough co., Ill., 60 miles N. E. of Quincy. Has a State Normal School, and three large hospitals.

Industrial establishments include foundries and plants for the manufacture of earthenware and drainpipes. Derives its name from General Macomb, who in 1814 defended Plattsburg against an English force. Pop. (1910) 5,776; (1920) 6,714.

Maddaloni

a city in Italy in the province of Caserta, situated about fifteen miles northeast of Naples. Located in one of the most fertile sections of Italy and near the Caroline aqueduct which supplies Caserta with water. Pop. (1920) about 20,000.

Madison

town in Madison co., Ill., two miles from St. Louis, Mo. A dozen different railway systems meet in vicinity, and the town is almost wholly industrial.

The manufacturing establishments include iron and steel mills, railroad shops, lead plants, and stone mills. The town has schools and libraries. Pop. (1910) 5,046; (1920) 4,996.

Madisonville

capital of Hopkins co., Ky., on the Kentucky Midland railroad, 40 miles S. E. of Henderson. It forms the junction to several railroads and has timber mills and coal mines.

Agricultural products, especially tobacco, are important articles of trade. Owns many of its public utilities. Pop. (1910) 4,966; (1920) 5,030.

Madre De Dios

chief tributary of Beni river, South America, over 900 MADREPORARIA miles long, rising in Peru, and running through Bolivia. At Rivera Alta nearly a mile wide.

Maeterlinck

MAURICE, a Bel-

Magallanes

the southernmost province of Chile, including all the islands located along the western and southern coasts. Most of the settlers live in Punta Arenas on the Strait of Magellan. Area 75,000 square miles; pop. 23,000.

Magdalen

or MAGDALENE,

Magic Circle

a circle invented by Franklin, founded on the same principles and possessing similar properties with the magic square of squares.

Magic Lantern

an instrument by which the images of objects, usually, but not always, transparent, and paintings or diagrams drawn on glass are exhibited, considerably magnified, on a wall or screen.

Magnesian Limestone

a limestone composed of carbonate of lime and carbonate of magnesia, the proportion of the latter sometimes being nearly 50 per cent. It effervesces much more slowly with acids than common limestone (carbonate of lime). It is sometimes earthy, sometimes hard and compact. One variety of it is DOLOMITE (q. v.).

Magnetic Equator

a theoretical line drawn on the surface of the earth, connecting the points at which a dip ping needle assumes a horizontal position, and at which the magnetic dip is zero.

ISM. is MAGNETIC NEEDLE. See MAGNET- MAGNETIC POLES. See MAGNETISM.