Mach
Figure one from: Ernst Mach, The Analysis of Sensations and the Relation of the Physical to the Psychical, translated by CM Williams and S Waterlow, page 19. The Open Court Publishing Company, Chicago and London, 1897. More at WikiMechanics.
Figure one from: Ernst Mach, The Analysis of Sensations and the Relation of the Physical to the Psychical, translated by CM Williams and S Waterlow, page 19. The Open Court Publishing Company, Chicago and London, 1897. More at WikiMechanics.