Looking for a stone for the Thinking Machine

photo of the Ibigawa river
The stone used to hold the motor down onto the floor is traditionally provided locally, wherever the Thinking Machine is shown. In Madrid and Berlin it was a piece of stony urban rubble; in Tokyo, a rock borrowed from a museum flower bed. For the Ogaki Biennale the composer Yuichi Matsumoto, who was at that time a post-graduate student at the Institute for Advanced Media Arts and Sciences (IAMAS, Ogaki), took me for a short expedition to the banks of the Ibigawa. I chose three or four stones and Matsumoto-san then selected one of them.
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