Space and geometry in the light of physiological, psychological and physical inquiry (1906)
Mach, Ernst, 1838-1916, McCormack, Thomas Joseph, 1865-1932 · Chicago The Open court publishing company; [etc., etc.] · leaf 95
once that the radius a nowpoints vertically upwards and has consequently per-formed half a revolution. The measure of the rev-olution is obtained from metrical concepts, whichfix idealized experiences on definite physical ob-jects, but the direction of the revolution is retained 88 SPACE AND… … Fig. 13. If I picture to myself a triangle with one of itsangles increasing, I shall also see the side oppositethe angle increasing. The impression thus arisesthat the interdependence in question follows a priorifrom a feat of imagination alone. But the imagina-tion has here merely reproduced a…
Geometry -- Foundations · Space perception
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