A wood log found lying on the ground, has been repaired with a powerful coil inserted into its core. When the coil draws on the gallery’s electrical current, the resistance produces a magnetic field that enables it to cling to a heavy slab of steel balanced against the wall. Resistance and power are connected both physically and conceptually: if the current is disconnected, the log is cut off and returns to the earth. [Via.](http://micheldebroin.org/fr/category/nouvelles/page/2/)