Lodestone

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Lodestone

A variety of magnetite that possesses magnetic polarity.
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By means of this loadstone, the island is made to rise and fall, and move from one place to another.
To explain the manner of its progress, let A B represent a line drawn across the dominions of Balnibarbi, let the line C D represent the loadstone, of which let D be the repelling end, and C the attracting end, the island being over C: let the stone be placed in position C D, with its repelling end downwards; then the island will be driven upwards obliquely towards D.
This loadstone is under the care of certain astronomers, who, from time to time, give it such positions as the monarch directs.
And the king, when he is highest provoked, and most determined to press a city to rubbish, orders the island to descend with great gentleness, out of a pretence of tenderness to his people, but, indeed, for fear of breaking the adamantine bottom; in which case, it is the opinion of all their philosophers, that the loadstone could no longer hold it up, and the whole mass would fall to the ground.
At first, the steel went round and round, quivering and vibrating at either end; but at last it settled to its place, when Ahab, who had been intently watching for this result, stepped frankly back from the binnacle, and pointing his stretched arm towards it, exclaimed, --Look ye, for yourselves, if Ahab be not the lord of the level loadstone! The sun is East, and that compass swears it!
The Loadstone Rock was drawing him, and he must sail on, until he struck.
"For the love of Heaven, of justice, of generosity, of the honour of your noble name!" was the poor prisoner's cry with which he strengthened his sinking heart, as he left all that was dear on earth behind him, and floated away for the Loadstone Rock.
He regarded this power of attraction in wealth to draw wealth to it, as something remarkably interesting and curious--something indefinably allied to the loadstone and gravitation.
He is like one of those booms which are set out from the shore on rivers to catch drift-wood, or like the loadstone amongst splinters of steel.
He was fond of comparing himself to Mahomet's coffin, attracted in two different directions by two loadstones, and hesitating eternally between the heights and the depths, between the vault and the pavement, between fall and ascent, between zenith and nadir.
The Middlesex Federation is an organisation that campaigns to raise awareness of the county and describes Middlesex Day as "the loadstone of perpetual Middlesex pride".