...189?. of three different parts of the spectrum respectively), and they severally cause the sensations of red, green and blue. But when all three of these...difficulties of the theories of Helmholtz and of Hering. Its assumption of a separate chemical process for the production of the sensation of grey gives it...

...'9 of three different parts of the specirjm respectively), and they severally cause the sensations of red, green and blue, But when all three of these. substances are present at once they recoinbine to produce the exciter of the grey sensation, and thus it happens that the objective mixing...

...of the spectrum respectively), and they severally cause the sensation of red, green, and blue. (4) But when all three of these substances are present at once, they re-combine to produce the excitant of the grey sensation, and thus it happens, that the objective mixing of three colours, in...

...But when all three of these substances are present at once, they re-combine to produce the excitant of the grey sensation, and thus it happens, that the objective mixing of three colours, in , " Archiv. f. Anat. u. Physiol., Abth.," 1882, Appendix, pp. 1—178. t " International...