Introduction / Douglas Kahn -- The world began with a sound / Stephen Muecke -- Imaginary energies: the arts of perpetuity / Steven Connor -- Photography as photoenergy / Daniel Hackbarth and James Nisbet -- Illuminating energy and art in the early twentieth century and beyond: from Marcel Duchamp to Keith Sonnier / Linda Dalrymple Henderson -- Giacomo Balla's sound-images / David Mather -- Leroi-Gourhan's hall of gestures / John Tresch -- Energies in the early works of Takis / Melissa Warak -- Entropies / Caroline A. Jones -- Joan Brassil: "The energy of the life game" / Susan Ballard -- Book of Tono-Rhythmology / Milford Graves -- Milpirri: Activating the at-risk / Jennifer Loureide Biddle -- On the potential for change: the play of forces in the work of Mario De Vega / Daniela Silvestrin -- Energy field performance: Peter Blamey / Douglas Kahn -- A place where the unknown past and the emergent future meet in a vibrating soundless hum: thought of energy and the contemporary / Marcus Boon -- Mooning Texas / Michael Taussig -- List of contributors -- Index