The glass is aligned to concentrate the sun’s rays, lighting the cannon’s fuse at high noon. More pics here, and a very detailed .pdf from the British Sundial Society on so-called “noon cannons” here. [via Neatorama]
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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.
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