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Variations

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Variation
Chapter 1
Variation →
 The variation is caused by the inæquality of the projecting parts of the Earth
Chapter 2
The variation is caused by the inæquality of the projecting parts of the Earth →
 The variation in any one place is constant.
Chapter 3
The variation in any one place is constant. →
 Variation and direction arise from the disponent power of the earth
Chapter 6
Variation and direction arise from the disponent power of the earth →
 The construction of the common mariners' compass
Chapter 8
The construction of the common mariners' compass →
 Can the terrestrial longitude be found from the variation?
Chapter 9
Can the terrestrial longitude be found from the variation? →
 The finding of the amount of variation
Chapter 12
The finding of the amount of variation →
 Why do the Observations of variation by seamen vary and uncertain?
Chapter 13
Why do the Observations of variation by seamen vary and uncertain? →
 The variation of the magnetick needle in the great Æthiopic and American sea, beyond the æquator.
Chapter 15
The variation of the magnetick needle in the great Æthiopic and American sea, beyond the æquator. →
 The variation in the interior of large Continents.
Chapter 19
The variation in the interior of large Continents. →
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