 round with an hollow Cylinder of Adamant, four Foot deep, as many
thick, and twelve Yards in Diameter, placed horizontally, and supported by Eight
Adamantine Feet, each Six Yards high. In the Middle of the Concave Side there is
a Groove Twelve Inches deep, in which the Extremities of the Axle are lodged,
and turned round as there is Occasion.
    This Stone cannot be moved from its Place by any Force, because the Hoop and
its Feet are one continued Piece with that Body of Adamant which constitutes the
Bottom of the Island.
    By Means of this Load-stone, the Island is made to rise and fall, and move
from one Place to another. For, with respect to that Part of the Earth over
which the Monarch presides, the Stone is endued at one of its Sides with an
attractive Power, and at the other with a repulsive. Upon placing the Magnet
erect with its attracting End towards the Earth, the Island descends; but when
the repelling Extremity points downwards, the Island mounts directly upwards.
When the Position of the Stone is oblique, the Motion of the Island is so too.
For in this Magnet the Forces always act in Lines parallel to its Direction.
    By this oblique Motion the Island is conveyed to different Parts of the
Monarch's Dominions. To explain the Manner of its Progress, let A B represent a
Line drawn cross the Dominions of Balnibarbi; let the Line c d represent the
Load-stone, of which let d be the repelling End, and c the attracting End, the
Island being over C; let the Stone be placed in the Position c d with its
repelling End downwards; then the Island will be driven upwards obliquely
towards D. When it is arrived at D, let the Stone be turned upon its Axle till
its attracting End points towards E, and then the Island will be carried
obliquely towards E; where if the Stone be again turned upon its Axle till it
stands in the Position E F, with its repelling Point downwards, the Island will
rise obliquely towards F, where by directing the attracting End towards G, the
Island may be carried to G, and from G to H, by turning the Stone, so as to make
its repelling Extremity point directly downwards. And thus by changing the
Situation of the Stone as often as there is Occasion, the Island is made to rise
and fall by Turns in an oblique Direction; and by those alternate Risings and
Fallings (the Obliquity being not considerable) is conveyed from one Part of the
Dominions to the other.
    But it must be observed, that
