Computers & Mobile Craft & Design Education Science
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#10

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Pneumatic mail systems

#9

The Rolamite

#8

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The Antikythera Device

#7

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Bobbing naval generator runs “eternally” on ocean’s heat

#6

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Pneumatic antenna launcher

#5

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Heron’s fountain

#4

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The rolleron

#3

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Clock self-winds from daily temperature changes

#2

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Ferguson’s “mechanical paradox”

#1

Unpowered mechanical gate opener

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I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and makezine.com. My work has also appeared in ReadyMade, c't – Magazin für Computertechnik, and The Wall Street Journal.

View more articles by Sean Michael Ragan