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"This is a predictive tool I've used: There are goals we've sought for ten thousand years, and we'll go on seeking them. Instant transport and travel, immortality (or at least longevity and miracle cures.), instant learning …"
- Larry Niven
 |
| Leyden Ball | ||
| Device for hunting underwater; transfers a powerful electrical charge to the prey. |
Really the grandfather of the taser.
In this excerpt, Captain Nemo is explaining to his reluctant guest Monsieur Arronax, how it is possible to use a rifle underwater.
| "Besides M. Aronnax, you must see
yourself that, during our submarine hunt, we can spend but little air
and but few balls."
"But it seems to me that in this twilight, and in the midst of this fluid, which is very dense compared with the atmosphere, shots could not go far, nor easily prove mortal." "Sir, on the contrary, with this gun every blow is mortal; and, however lightly the animal is touched, it falls as if struck by a thunderbolt." "Why?" "Because the balls sent by this gun are not ordinary balls, but little cases of glass. These glass cases are covered with a case of steel, and weighted with a pellet of lead; they are real Leyden bottles, into which the electricity is forced to a very high tension. With the slightest shock they are discharged, and the animal, however strong it may be, falls dead. I must tell you that these cases are size number four, and that the charge for an ordinary gun would be ten." |
| From 20,000 Leagues Under the Sea,
by Jules Verne. Published by Various in 1875 Additional resources -
|
The Leyden jar is a cylindrical container made of a dielectric (an insulator, like glass) with a layer of metal foil on the inside and outside. With the outside surface grounded, a charge is applied to the inside surface. This gives the outside an equal but opposite charge. When the outside and inside surfaces are connected by a conductor, the stored electrical energy is discharged. It was the world's first working capacitor.
Decorative mid-19th century Leyden Jars
The Leyden jar was first discovered by Ewald Georg von Kleist, a German inventor. However, Pieter van Musschenbroek of the University of Leyden discovered the Leyden jar independently in 1746 and the name remains. Find out more about the Leyden Jar at Faradnet.
The Leyden jar was used in the first atom smasher, built at Cambridge University. This device used banks of them as condensers and could store up to one million volts.
And, for those of you who long to join Captain Nemo and hunt in the ocean depths, conveniently located just outside your baroque 19th century submarine, you can get close with the Aquarius Underwater Laborator Virtual Tour (requires Ipix plug-in). Or, read more about the Captain Nemo's submarine - the Nautilus.
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Additional
resources:
More Ideas
and Technology from 20,000 Leagues Under the Sea
More Ideas
and Technology by Jules Verne
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- TASER XREP Neuro-Muscular Incapacitation
| HEL TVD Laser System To Be Built By Dynetics Lockheed Martin |
| ZKZM-500 LASER Assault Rifle |
| Drone Assassin Fails To Kill Venezuelan President |
| Musk's Boring Flamethrower |
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As far as the future is concerned 'they're the only experts we have'.
'The walls and ceiling bore an irregular spacing of illuminum tiles...'
'The planes flew continuously, twenty-four hours a day...'
'It was even conceivable that they watched everybody all the time.'
'...a single perfectly level platform, which rose so high above the water that it was not splashed by the waves.'
'Is an extra-factual memory that convincing?' Quail asked.
