...light, and producing distinct vision, so that the defect arises from no insensibility of the retina to rays of any particular refrangibility, nor to any...appreciating exactly those differences between rays in which their colour depends. The following is the result of a series of trials in which a succession...

...; but this opinion is, we think, not well founded. Mr. Herschel attributes this state of vision to a defect in the sensorium, by which it is rendered...differences between rays on which their colour. depends. PART IV. ON OPTICAL INSTRUMENTS. ALL the optical instruments now in use have, with the exception of...

...; but this opinion is, we think, not well founded. Mr. Herschel attributes this state of vision 10 a defect in the sensorium, by which it is rendered...exactly those differences between rays on which their color depends.* PART IV. ON OPTICAL INSTRUMENTS. ALL the optical instruments now in use have, with...

...rays from reaching the retina (as has been ingeniously supposed), but from a defect in the sensorinm by which it is rendered incapable of appreciating...differences between rays on which their colour depends." Dr. Spurzheim and Mr. Combe suppose, that perception is the lowest, and memory the highest state of...

...careful investigations presently to be noticed. Sir John WF Herschell attributes this state of vision to a defect in the sensorium, by which it is rendered...differences between rays on which their colour depends. This profound philosopher observes, " We have examined with some attention a very eminent optician, whose...

...made on eyes affected with this peculiarity, is probably the correct one, viz. that jt is owing to " a defect in the sensorium, by which it is rendered...differences between rays on which their colour depends." of the complaint. In these cases he succeeded in removing the affection by dividing the recti muscles...

...but this opinion is, we think, not well founded. Mr. Herschel attributes this state of vision * to'a defect in the sensorium, by which it is rendered incapable...exactly those differences between rays on which their color depends.* PART IV. ON OPTICAL INSTRUMENTS. ALL the optical instruments now in use have, with...

...light, and producing distinct vision ; so that the defect arises from no insensibility of the retina to rays of any particular refrangibility, nor to any...differences between rays on which their colour depends. "t There are instances of individuals who involuntarily associate particular colours with particular...

...Journal, 1829, vol. ii. p. 12. sion ; so that the defect arises from no insensibility of the retina to rays of any particular refrangibility, nor to any...those differences between rays on which their colour depends."1 It appears difficult, however, to perform an experiment of this nature which should be conclusive....

...light, and producing distinct vision, so that the defect arises from no insensibility of the retina to rays of any particular refrangibility, nor to any...differences between rays on which their colour depends. The following is the result of a series of trials, in which a succession of optical tints produced...