A. Kircher: Mundus Subterraneus

Preface

I. The occasion of this Work and the Author's Travels
II. About the horrendous earthquakes which arose in Calabria in the year 1638, during which, after a period of fourteen days, the author learned the secrets of nature present with great danger to his life.
III. The exploration of Mount Vesuvius and the other islands made by the author.

Book I. Elementary Geometry and Physico-mathematics (Centrographicus)

	I. The wonderful nature of the Center and the Grand Work of God.	I. Definitions Explained
		II. The Line of Direction.
		III. Paradoxes of the Center of the Earth
	II. The Motion of Gravity at the Center of the Universe	I. Definition of the local motion of bodies and impulses
		II. Concerning the accelerated and forced natural motion of heavy objects, and its proportion to the time at which it completes the said space.
		III. The motion of heavy objects inclined above a plane.
		IV. The motion of the pendulums.
		V. The parabolic motion of projectiles and its amazing effects.
	III. Utilities which can be derived from cosmocentric art.	I. How the velocity of the motion of gravity can be determined at the center.
	IV. Centrosophia applied.	I. Centrosophia applied.
		II. The motions of the pendulums.
		III. The use and advantage of the above
		IV. The use of pendulums in things pertaining to geometry

Book II. The creation of the terrestrial globe.

	I. The purpose of Geocosm
	II. The idea of the earthly globe exists in the Divine mind.
	III. The nature and composition of the globes or stars of the world, and how they flow into the lower world.
	IV. From the Sun and its admiring workmanship, strength, and properties, which influences the earthly world
	V. The nature and effects of the lunar body.
	VI. The Proportion of the Earth's Globe to the Sun and Moon
	VII. The outermost structure of the Earth and its size.
	VIII. The Mountains of Geocosm and their necessity
	IX. The mysterious constitution of the mountains.
	X. Mountains in particular, and their secrets to the modern architecture of the human race.
	XI. Volcanoes or Vulcans' mountains.
	XII. Whether the mountains dwindle with time, or grow again;
	XIII. The waters and ocean surrounding the geocosm, and the seas sharing secret passages.
	XIV. The height of the mountains and the depth of the ocean and sea, where also the height of the Caucasus mountain was asserted by Aristotle.
	XV. The unevenness of the sea , to which a memorable story is added, confirmed by what has been said above.
	XVI. A measure of the reliance on Sicily was created by the author in the year 1638.
	XVII. The Earth's magnetic position, or of the shot of the Earth.
	XVIII. The geocosm or an earthly body is by no means homogeneous, but of a heterogeneous nature; and of the wonderful variety of things by which the earthy body is composed, and what is the true and proper earthly element.
	XIX. The interior constitution of the geocosm, factories and analogy to the parts of the human body.
	XX. From the caves, chasms and innumerable passages of the Earth

Book III. Hydrography

I. The nature of the aqueous element, or of the sea, and the continuous movements by which it is not agitated at any time, and the amazing effects which it performs in the subterranean world.
	I. The diversity of motions by which the sea is agitated
	II. The general motion of the sea, which is from East to West.
	III. The motions which they call running, whether reflected or reflexive.
	IV. The general motion of the sea and its effects on the terrestrial Orbe.
II.
	I. The second general motion of the sea, composed of two opposing mountains, and which they call the tide of the sea, or current and ebb, also the approach and withdrawal, or the swelling and swelling of the sea.
	II. By what power or quality the moon moves the sea.
	III. Why the sea exerts its force in the time of the New Moon and Full Moon.
	IV Why the sea does not always flow for six hours or ebb in different parts of the Earth, and whence such irregular sea movements occur.
	V. Why does the greatest swelling of the sea occur at London in the river Thames, when the moon was established in the south-west part of the quadrant; In contrast to the Moon in the Northern Standards, and in the Euro-northern region, then a very large swelling occurs, just three hours before it reaches the south of London.
	VI. Why at the mouth of the river Garonne in Gaul, the water increases by seven hours, but decreases only by three; on the other hand, in the Senega river Agrica, the water of the sea increases by four hours, and decreases by eight.
	VII. General Index.
	VIII. Why the South Sea, commonly known as the del Zur, near Panama causes such an unusual and incredible flow and ebb. On the other hand, in the Boreal Sea, commonly known as del Nord, near the port of Nombre di Dios, and on the other shores of the continent of America, the tide is scarcely sensitive.
	IX. Index to
	X. From the wonderful Deep Norway, the most famous and greatest of all in the whole world.
III. The Plemmyrica Ars.
	I. The practice and practice of sea tide in nautical matters.
	II. The Ocean's Pericycle or Circulation.
	III. The freshness of the sea, its origin, necessity, and other accidents of the ocean and sea.
	IV. Let it be further equal to the sea salt scattered along all the paths of the ocean.

Book IV. Pyrologus

I. The nature of underground fire, its location and its operations.
	I. The necessity and essence of underground fire and whether it is a true element.
	II. What is the true element of fire, and where is its proper place?
	III. Concerning the subterranean fire that spreads throughout all, and why it is perpetual in some places, but not in others.
	IV. From the Phlegraean Plain in the Puteolanus Agro.
	V. From the Cave of Charonius, commonly known as La Grotta de Cani, it is at Lake Agnano, not far from Naples, and from Lethea, by the force and property by which it destroys those who are entering it.
	VI. The voluminous mountains which can be seen on the farthest surface of the Earth demonstrate that the Earth is full of fires.
	VII. The perpetual duration of fire, and of the same fodder or fodder.
	VIII. Aetna's classification, in which, as it were, in a prototype of the subterranean fires, and their unfailing fuel, as is wont to be said, the patterns are displayed to the eye.
	IX. The description of the crater of Aetna.
II. The causes of air and winds, nature, strength, and variety, which dominate both in the outer surface of the geocosm and in the inner cavernous regions of the underground.
	I. The manifold cause of the winds, their division and definition.
	II. The general wind, and how, and for what reason, it may arise.
	III. Periodicals or anniversaries which the Greeks call the Etesian winds, and about their causes.
	IV. Concerning the annual winds in the ocean observed by sailors from the Spanish, Dutch, Portuguese, and English.
	V. The causes of different winds are explained.
	VI. The Transverse Motion of the Winds and its Cause.
	VII. Whence arise the tremor, undulation, and the rush of different degrees of intensity and release of the wind, and how can that sound be known?
	VIII. The nature and property of the winds.
	IX. The production of artificial winds, which contribute both to recreation and to the benefit of men.
	X. There is no meteor that does not derive its genesis from the subterranean world, and that in it all kinds of meteors are produced, not just as in the external surface and aerial regions.
	XI. All meteorological impressions which are born on high are shown to originate from underground fires.
	Winds in general and the cause of its motion.

Book V. Origin of lakes, fountains and rivers.

1. Springs. The origin of rivers and lakes, and their diverse nature, strength, and abundance.
	I. The multiple sources of origin
	II. The principal and general cause of springs and rivers.
	III. The other ways and methods.
	IV. The origin of lakes in the lowlands.
II. The various differences and qualities of water.
	I. The pure water of Springs, and of its goodness and malice.
	II. Anyone can find out about the Aquilegia, or the standards by which, where the water lies somewhere beneath the Earth.
	III. Mixed or compound medicated waters in general, and their causes, and of the mixtures with minerals in a different manner and method.
	IV. The mixtures of medicinal waters.
	V. A description of the hydrometer, by which the gravity and lightness of the water is examined.
	VI. Concerning the heat and heat of bathrooms, its purpose, and how these mineral dyes are mixed in so different.
III. Concerning the thermal baths and medicated waters, and their amazing strength and properties in particular, all of which are shown to have their origin from the underground.
	I. The principal thermal baths or medicated waters that occur everywhere on the surface of the geocosm.
	II. As a result, bathrooms have the ability to counteract so many different diseases.
IV. The miracles of the waters, and the prodigious nature and property of certain fountains.
	I. The color, taste, smell, and mephiti in some shining fountains and baths.
	II. The gravity and lightness of some waters, and their miracles.
	III. From the deadly waters and the trenches of the Charone, destroyers abound with violence.
	IV. The flow and ebb and flow of some springs, and the changing of the waters, as also the fountains of those who herald the love of corn.
	V. The Metamorphotical Force of Fountains, Rivers, and Lakes, by which, when cast, they turn each other into rocks and other kinds of metal.
	VI. The other miracles of the water
	VII. The metamorphosis of the various lakes, rivers, springs, and changes of parts of the Earth.

Book VI. The fourth element we call Earth, its products and first fruits of the Subterranean world.

I. Concerning the wonderful variety of the Earth, and whether it is truly and properly an element, and what and what ought to be understood by it.
	I. The Element of the Earth
	II. The great variety of things which are contained in the womb of the globe
	III. The incredible variety of things, which, by the power of salt, together with the auxiliary forces of the other elements, are produced in the vast womb of Megacosm, and first of all regarding salt and its differences.
	IV. The differences between salts.
	V. Method of Extracting Salts
II.
	I. Nitro, and its Species of Salenitro, Aphronitro, Halinitro.
	II. Salenitro third salt species
	III. The generation of the Salinis, nature, and strength.
	IV. The manner and method of the making of gunpowder Nitrosus, and its various uses in the pyrobolic art.
III. Alum, third species of salt.
	I. The Name, Definition, and Variety of Alum.
	II. The Nature, Quality, and Preparation of Alum
	III. The medicinal strength and other uses of Alum.
IV. On Vitriol and its amazing properties.
	I. The definition, division, and origin of Vitriol
	II. Whether he turned Iron truly and really into Ore, by means of the Spirit of Vitriol.
	III. The variety, strength, and properties, and use of Vitriol.
	IV. The party of Vitriolo.
APPENDIX. On the four kinds of salts.

Book VII. Nature, properties and uses of minerals or fossils, which properly look like terrestrial elements and the rotations and the periciclosis which are produced by their motion.

I. The portions of the Earth, and the bodies of sand, which are included in the womb of Geocosm.
	I. Sand, Gravel, Gravel, Ashes
	II. The Quality and Use of Sand
	III. Pericyclosis of Nature is amazing.
II. The Hylocinesi of the Earthly Globe, that is, of the Great and Perpetual Separation of Earthly Mechanics, of Sand, of Gravel, of Gravel Movement, or of the resolution of Clay, Stones, and Metallic Mixtures.
	I. The Causes of Geocosmical Change
	II. What the Earth is properly, whence it is generated, and of the various earthly substances which they commonly call Earth.
	III. That is why so much diversity grows in the landscape.
	IV. The use of different landscapes.
	V. The requirements for agriculture.
	VI. The terrestrial bodies which come into use by the individual Sculptors and Painters.
Recapitulation and Conclusion