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"If I can make you see the world the way I see it, then you will automatically think the way I think."
- Philip K. Dick
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| Paracompass | ||
| A very specialized compass that makes use of local magnetic anomalies. |
Early navigation relied on several natural phenomena; the fixed pole star (or stars, when the pyramids were built) and the north magnetic pole. What can you do if a planet has no stable magnetic field, or if the planet's surface is prone to storms that disrupt the field?
| The glowing tab of the Fremkit manual between them on the tent floor caught her eye. She lifted it, glanced at the flyleaf, reading: "Manual of 'The Friendly Desert,' the place full of life. Here are the ayat and burhan of Life. Believe, and al-Lat shall never burn you..." Paul lifted the paracompass from the pack, returned it, said: "Think of all these special-application Fremen machines. They show unrivaled sophistication. Admit it. The culture that made these things betrays depths no one suspected." |
| Technovelgy from Dune,
by Frank Herbert. Published by Putnam in 1965 Additional resources -
|
People have made practical use of the Earth's magnetic field since ancient times, but it wasn't until 1600 that William Gilberte, personal physician to Queen Elizabeth, published his astounding De Magnete. In it, he revealed his studies with a "terrella" (a magnetized sphere); he hypothesized that the Earth was itself an immense magnet.
If you're into magnetic fields (and, in fact, we all are - just use a compass!), take a look at the very cool Earth's Magnetic Field Images, an interactive page that allows you to see field strengths at different years in the 20th century. (Courtesy of our friends at NOAA - the National Oceanic and Atmospheric Administration.) (Special thanks to a reader who pointed me to a new URL for the old one!)
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'The king, an old hand in the running of tyrannies, instantly grasped the directions...'
'...a hemispherical force field enclosing his head.'
'Then he became aware of a gentle pressure pushing him away from the ship.'
'And now they wre busily transforming all their companions, and so on, and so on...'
'Why, a clockwork dancer, or, better still, one that would go by electricity and never run down...'
'Maybe the individual intelligence of each Cubic pools into a group intelligence...'
