Prev. 100Magnetism of Gases1 Magnetism Sub-permanent1 Magnetization by Double Touch1 Magnetization by Separate Touch1 Magnetization by Single Touch1 Magnetization by the Earth1Magnetization Curve1 Magnetizing Coil1 Magnet-keeper1 Magneto1 Magneto Bell1 Magneto Call Bell1 Magneto-electric Brake1 Magneto-electric Generator1 Magneto-electric Telegraph1 Magneto-electric. adj.1 Magnetograph1 Magneto-Inductor1 Magnetometer1 Magnetometry1 Magneto-motive Force1 Magnetophone1 Magnetoscope1 Magni nominis umbra1 Magnificat1 Magnificent1 Magnifying Spring Ammeter1 Magnitude1 Magnum Bonum2 Magnum opus1 Magnus’ Law1 Magpie3 Magsman1 Mahcheen1 Mahogany2 Mahogany flat1 Mahometan Gruel1 Mahoun1 Maht1 Mahte1 Mai1 Maia1 Maid1 Maid Marian1 Maid of Athens1 Maid of Saragossa1 Maiden2 Maiden (beheading)1 Maiden Sessions1 Maidenhead1 Maidens’ Castle1 Maids adorning1 Maidstone jailer1 Maigre2 Mail1 Mail man1 Maille2 Main1 Main Battery1 Main Battery Circuit1 Main Circuit1 Main guy1 Main or Standard Feeder1 Maine1 maintien le droit1 Main-toby1 Mais1 Maison1 maison de campagne1 maison de force1 maison de santé1 maison de ville1 maison d’arrêt1 Maistre Richard Wace1 Maître1 maitre des basses œuvres1 maitre des hautes œuvres1 maitre d’hôtel1 maitre d’hôtel butter1 maitresse1 Maj.1 Maj.-gen.1 Majesty1 Maji1 Major Bath1 Major Pendennis1 Make6 Make and Break Current2 Make one tired1 Make tracks1 Make Weight1 Make. v.1 Maken1 Maker1 Make-up1 Makings1 Mal1 mal à propos1 mal de dents1 mal de mer1 Prev. 100

Magnetization by the Earth

The earth imparts magnetism to iron masses. If a rod of steel is held parallel to the inclination and in the magnetic meridian it exhibits polarity, which by jarring or hammering, can be made to some extent permanent. A piece of soft iron held vertically, or still better in the line of the dip as above, and which is twisted when in that position, becomes magnetized with some degree of permanence. Many other instances are cited, such as fire-irons, lamp-posts, iron gates, lathe turnings, all of which often exhibit polarity, having been magnetized by the earth's field.

[Transcriber's note: The earth's magnetic field is believed to originate it electric currents in the moving molten core.]