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 118
Fig. 15. motion. The sum of the interior angles of the tri-angle 1 2 3 so produced is evidently 2 R. The sameconsideration also throws into relief the properties 1 C. E. Kosaek, Beitrage zu einer systematischen EntwicTcel-wig der Geometrie aus der Ansclumung, Nordhausen, 1852. Iwas able to see this…
Geometry -- Foundations · Space perception
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
