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