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The Principles of the Earth

The principles of phenomena on Earth according to Descartes

The Formation of the Earth

Articles 1-5

The 3 Regions of the Earth

Articles 6-9

The Matter of the Earth

Articles 10-14

The Motion Of the Air-Aether Globules

Articles 15-19

Liquid Properties and Surface Tension

Articles 18-19

The Second Action of Air-Aether: Gravity

Articles 20-23

The Effect of Gravity on Bodies

Articles 24-27

How Does Light Move Air Particles?

Articles 28-31

The 3 Kinds of Terrestrial Particles

Articles 32-36

The 3 Kinds of Terrestrial Particles

Articles 37-39

The Mountains, Seas, and the Air

Articles 40-47

The Nature of Physical Air

Articles 40-47

The Nature of Water

Articles 48-49

The Tides and the Moon

Articles 50-56

The Nature of the Earth's interior

Articles 57-63

The Origin of Springs

Articles 64-71

The Origin of Metals

Articles 72-79

The Nature of Fire

Article 80-86

Fire Produced from Objects

Article 87-91

Fire from Dried Leaves

Article 92

How a Candle Burns

Article 95

Why Some Things Burn and Others Do Not

Article 102-108

Gunpowder made of sulfur, saltpeter, and charcoal

Articles 109-119

Lamps that burn for a long time

Articles 116-119