Book contents
- Frontmatter
- PREFACE
- Contents
- NAUTICAL
- WAR AND HUNTING
- ARCHITECTURE
- TOOLS
- OPTICS
- USEFUL ARTS
- CHAPTER I PRIMITIVE MAN AND HIS NEEDS.—EARTHENWARE.—BALL-AND-SOCKET JOINT.—TOGGLE OR KNEE JOINT
- CHAPTER II CRUSHING INSTRUMENTS.—THE NUT-CRACKERS, ROLLING-MILL, AND GRINDSTONE.—PRESSURE OF ATMOSPHERE.—SEED DIBBLES AND DRILLS
- CHAPTER III CLOTH-DRESSING.—BRUSHES AND COMBS.—BUTTONS, HOOKS AND EYES, AND CLASP
- CHAPTER IV THE STOPPER, OR CORK.—THE FILTER
- CHAPTER V THE PRINCIPLE OF THE SPRING.—THE ELASTIC SPRING.—ACCUMULATORS.—THE SPIRAL SPRING
- CHAPTER VI SPIRAL AND RINGED TISSUES.—VARIOUS SPRINGS IN NATURE AND ART
- CHAPTER VII FOOD AND COMFORT
- CHAPTER VIII DOMESTIC COMFORT
- CHAPTER IX ARTIFICIAL WARMTH.—RING AND STAPLE.—THE FAN
- CHAPTER X WATER, AND MEANS OF PROCURING IT
- CHAPTER XI AËROSTATICS.—WEIGHT OF AIR.—EXPANSION BY HEAT
- CHAPTER XII
- CHAPTER XIII TELESCOPIC TUBES.—DIRECT ACTION.—DISTRIBUTION OF WEIGHT.—TREE-CLIMBING.—THE WHEEL
- CHAPTER XIV
- CHAPTER XV
- CHAPTER XVI TILLAGE.—DRAINAGE.—SPIRAL PRINCIPLE.—CENTRI-FUGAL FORCE
- CHAPTER XVII OSCILLATION.—UNITED STRENGTH.—THE DOME
- ACOUSTICS
- INDEX
- Frontmatter
- PREFACE
- Contents
- NAUTICAL
- WAR AND HUNTING
- ARCHITECTURE
- TOOLS
- OPTICS
- USEFUL ARTS
- CHAPTER I PRIMITIVE MAN AND HIS NEEDS.—EARTHENWARE.—BALL-AND-SOCKET JOINT.—TOGGLE OR KNEE JOINT
- CHAPTER II CRUSHING INSTRUMENTS.—THE NUT-CRACKERS, ROLLING-MILL, AND GRINDSTONE.—PRESSURE OF ATMOSPHERE.—SEED DIBBLES AND DRILLS
- CHAPTER III CLOTH-DRESSING.—BRUSHES AND COMBS.—BUTTONS, HOOKS AND EYES, AND CLASP
- CHAPTER IV THE STOPPER, OR CORK.—THE FILTER
- CHAPTER V THE PRINCIPLE OF THE SPRING.—THE ELASTIC SPRING.—ACCUMULATORS.—THE SPIRAL SPRING
- CHAPTER VI SPIRAL AND RINGED TISSUES.—VARIOUS SPRINGS IN NATURE AND ART
- CHAPTER VII FOOD AND COMFORT
- CHAPTER VIII DOMESTIC COMFORT
- CHAPTER IX ARTIFICIAL WARMTH.—RING AND STAPLE.—THE FAN
- CHAPTER X WATER, AND MEANS OF PROCURING IT
- CHAPTER XI AËROSTATICS.—WEIGHT OF AIR.—EXPANSION BY HEAT
- CHAPTER XII
- CHAPTER XIII TELESCOPIC TUBES.—DIRECT ACTION.—DISTRIBUTION OF WEIGHT.—TREE-CLIMBING.—THE WHEEL
- CHAPTER XIV
- CHAPTER XV
- CHAPTER XVI TILLAGE.—DRAINAGE.—SPIRAL PRINCIPLE.—CENTRI-FUGAL FORCE
- CHAPTER XVII OSCILLATION.—UNITED STRENGTH.—THE DOME
- ACOUSTICS
- INDEX
Summary
ELECTRICITY AND MAGNETISM
IT has long been known that Electricity, Galvanism, and Magnetism are but different manifestations of the same force, and that one can be converted into the other at will. It is also known that this wonderful and most important principle lies latent in everything, and only needs the proper machinery to evoke it.
The few following illustrations are intended to show its prevalence in Nature, and that human art does not create, but only makes manifest a power that exists, but lies latent until called forth.
Without going into details, which would occupy the whole of such a volume as this, I may mention that Electricity saturates all the material creation, and that even man himself is not only a reservoir of electricity, but that he feels positively ill if the normal amount be not supplied.
Take, for example, the hours that precede a thunder-storm. We feel languid and depressed. We cannot bring our thoughts together. We are almost incapable even of bodily labour. The reason is, that the portion of the earth on which we live has parted with some of its electricity, and has drawn it out of our bodies.
Then comes the welcome thunder-storm; clouds overcharged with electricity come to restore the balance. The lightning flashes from the clouds to the earth as soon as they are near enough; the rain falls, carrying with it stores of silent electricity; and in an hour or two all seems changed.
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- Nature's TeachingsHuman Invention Anticipated by Nature, pp. 482 - 491Publisher: Cambridge University PressPrint publication year: 2009First published in: 1877