The seven follies of science; a popular account of the most famous scientific impossibilities and the attempts which have been made to solve them. To which is added a small budget of interesting paradoxes, illusions, and marvels (1906)
Phin, John, 1830-1913 · New York, D. Van Nostrand company · leaf 163
tions are ex- ceptionally changed, but the instinctive interpretation remains the same, unless a frequent repetition of the exper- iment has overcome the effect of our first education on this point. The experiment, in fact has to be repeated a great number of times to make the illusion become less… … Fig. 23. Fig. 24. ground, and in Fig. 24 a white spot is placed on a black ground ; which is the larger, the black spot or the white one ? To every eye the white spot will appear to be the largest, but as a matter of fact they are both the same size. This curious effect is attributed by Helmholtz…
Scientific recreations · Geometry
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
