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THE CLOCK OF THE LONG NOw - Long Now Foundation

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Options considered for powering the Clock:<br />

Atomic Poor Maintainability & Transparency<br />

Chemical Poor Scalability<br />

Solar Electric Poor Maintainability<br />

Prestored potential energy Poor Scalability<br />

Water flow Exposure to water<br />

Wind Exposure to weather<br />

Geothermal Poor Scalability<br />

Tidal gravitational changes Poor Scalability<br />

Temperature change<br />

Pressure change Need for bellows or seal<br />

Seismic and plate tectonic Poor Scalability<br />

Human winding Fosters responsibility<br />

Conclusion: My current favorite is human winding because it fits with goals of clock.<br />

Temperature change is also a viable alternative.

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