On the lodestone and magnetic bodies and on the great magnet the earth : a new physiology demonstrated with many arguments and experiments / William Gilbert of Colchester, physician of London ... a translation by P. Fleury Mottelay.

  • Gilbert, William, 1544-1603.
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: On the lodestone and magnetic bodies and on the great magnet the earth : a new physiology demonstrated with many arguments and experiments / William Gilbert of Colchester, physician of London ... a translation by P. Fleury Mottelay. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    PAGE XVII. That the terrestrial globe is magnetic and is a loadstone; and, just as in our hands the loadstone possesses all the prim- ary powers (forces) of the earth, so the earth by reason of the same potencies lies ever in the same direction in the universe 64 BOOK II. Chapter I. Of magnetic movements 72 II. Of magnetic coition, and, first, of the attraction exerted by amber, or, more properly, the attachment of bodies to amber 74 III. Opinions of others concerning magnetic coition, which they call attraction 07 IV. Of the strength of a loadstone and its form: the cause of coition 105 V. In what manner the energy inheres in the loadstone 115 VI. How magnetized iron and smaller loadstones conform to the terrella, and to the earth itself, and are governed thereby. 121 VII. Of the potency of the magnetic force, and of its spherical ex- tension 123 VIII. Of the geography of the earth and the terrella 124 IX. Of the equinoctial circle of earth and terrella 126 X. The earth's magnetic meridians 126 XI. Parallels 127 XII. The magnetic horizon 128 XIII. Of the magnetic axis and poles 128 XIV. Why the coition is stronger at the poles than in the parts be- tween equator and pole; and the relative power of coition in different parts of the earth and the terrella 129 XV. The magnetic force imparted to iron is more apparent in an iron rod, than in an iron sphere, or cube, or iron of any other shape 131 XVI. That motion is produced by the magnetic force through solid bodies interposed: of the interposition of a plate of iron. 132 XVII. Of the iron helmet (cap) of the loadstone, wherewith it is armed at the pole to increase its energy; efficiency of the same 137 XVIII. An armed loadstone does not endow with greater force mag- netized iron than does an unarmed one 138 XIX. That unition is stronger with an armed loadstone: heavier weights are thus lifted: the coition is not stronger, but commonly weaker 139 XX. That an armed magnet lifts another, and that one a third: this holds good though there be less energy in the first 139 XXI. That when paper or other medium is interposed, an armed load- stone does not lift more than one unarmed 140