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"In science fiction one can say a great many things that are unpalatable, … because it's expressed as science fiction you can slip it past their defenses."
- Frederik Pohl
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| Message Tree | ||
| A tree growing out of a huge cliff of crystal provides communication for a world. |
The message tree is a remarkable and creative idea, particularly in the context of the novel. The planet Lithia has virtually no naturally occurring metals on the surface and electrical power is extremely difficult to generate; how can you recreate electronic communications equipment? The answer lies in the piezoelectric effect.
| If the night were to turn out to be especially windy, there would doubtless be many voices coming and going to the Message Tree. It loomed ahead of him now, a Sequoialike giant... As the winds came and went... the tree nodded and swayed. With every movement, the tree's root system ... tugged and distorted the buried crystalline cliff upon which the city had been founded. At every such pressure, the buried cliff responded with a vast heart-pulse of radio waves - a pulse detectable not only all over Lithia, but far out into space as well. |
| Technovelgy from A Case of Conscience,
by James Blish. Published by If in 1953 Additional resources -
|
This sort of message device also lent itself well to the story; the world of Lithia was one in which the biosphere was seen as important by the indigenous sapient life.
The piezoelectric effect was discovered by one of more of the Curies around 1880; it is the voltage produced between surfaces of a solid nonconducting substance (dielectric) when mechanical stress is applied.
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Tech news articles related to A Case of Conscience
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Message Tree-related
news articles:
- Tweeting Tree Like Blish's Message Tree
| Polish Turns Your Nail Into A Stylus |
| Huawei Pura X Folding Phattie Phone |
| Positioned Cybertrucks With Free Starlinks WiFi In LA |
| Will Whales Be Our First Contact? |
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'The object seemed melted together like wax — nothing was distinguishable.'
'Midges have many capabilities. To the untrained eye, they look like sparrows.'
'I made disks of my own voice to the number of five hundred very carefully chosen words.'
'His sensors out and working, and the whirring of the tape that sucked up sight and sound and shape and smell and form...'
'It sounds to me as though you had invented a kind of metal earthworm.'
'I don't have to tell you about the seven two-mile-diameter orbital mirrors that circulate around the satellite, making it habitable.'
'The steel tortoise gave MacKinnon a feeling of Crusoe- like independence.'
