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appears Aristotle attention average beat Binocular Binocular Vision blind-spot blocks blue called cent cold spots colour blind colour vision combined dichromats discrimination and choice disks distance drum dynamometer effect error fact feeling figures finger force fork give glass grams green grey Gustav Theodor Fechner hand hear Herbart Hermann von Helmholtz idea illusion illustrated increased indicate intensity interval irregularity least noticeable change least noticeable difference left eye light looking measured memory ment mental method middle Moon Illusion moved movement objects observation odour olfactometer orange paper person pitch placed plethysmograph point of regard produce psychology purple quinine reaction-time record Rhythm seen sensations shades shown in Fig shows smell sound spectrum colours sphygmograph star Steadiness stereoscope strikes suggestion Suppose Symmetry taste things thought threshold tion tone touch Trichromats tube vibrations weight Wilhelm Wundt words yellow
Page 209 - ... probably never in all their lives received one genuine colour-sensation. The modern religionists of the school of Overbeck are just like people who eat slate-pencil and chalk, and assure everybody that they are nicer and purer than strawberries and plums.
Page 5 - I have noticed in one of my formicaria a subterranean cemetery, where I have seen some ants burying their dead by placing earth above them. One ant was evidently much affected, and tried to exhume the bodies, but the united exertions of the yellow sextons were more than sufficient to neutralise the effort of the disconsolate mourner.