...investigations presently to be noticed. .Sir JOIIN \VF HKRSCIIEL attributes this state of vision to a defect in the sensorium, by which it is rendered incapable of appreciating exactly thos 1 flptict, Am. ed. p. C'J. 'Jnnala of rhilotnpby, Feb. 1822, p. 128. 3 Et^ayt on the Morbid Anatomy...

...but this opinion is, we think, not well founded. Sir J. Herschell attributes this state of vision to a defect in the sensorium, by which it is rendered...exactly those differences between rays on which their colour depends. 96 Fig. C.— AIR-PUMP. THE ATMOSPHERE. 1. Experimental proofs of the weight of the...

...with a piece of cloth of scarlet color. Such states of vision are attributed by Sir J. Herschel to a defect in the sensorium, by which it is rendered...differences between rays on which their color depends. OPTICAL INSTRUMENTS. 306. The Microscope.*—This instrument, designed for aiding the eye in perceiving...

...but this opinion is, we think, not well founded. Sir J. Herschell attributes this state of vision to a defect in the sensorium, by which it is rendered...exactly those differences between rays on which their colour depends. Fig. 2. THE PRINTING PRESS. CHAPTEE I. 1. The improvement of the art not promoted by...

...but this opinion is, we think, not well founded. Sir J. Herschel attributes this state of vision to a defect in the sensorium, by which it is rendered...exactly those differences between rays on which their colour depends. CHAP. XV. OPTICAL INSTBUMENTS. 1188. Spectacles. — These are the most simple and...

...but this opinion is, we think, not well founded. Sir J. Herschel attributes this state of vision to a defect in the sensorium, by which it is rendered...of appreciating exactly those differences between rajs on which their colour depends. CHAP. XV. OPTICAL INSTRUMENTS. 1188. Spectacle*. — These are...

...but this opinion is, we think, not well founded. Sir J. Herschel attributes this state of vision to a defect in the sensorium, by which it is rendered incapable of appreciating exactly those dif/ Terences between rays on which their colour depends. v / CHAP. XV. OPTICAL INSTRUMENTS. 1188....

...eye preventing certain rays from reaching the retina, (as has been ingeniously supposed,) but from a defect in the sensorium, by which it is rendered incapable of appreciating exactlv those differences between rays on which their colour depends."t There are instances of individuals...

...from no insensibility of the retina to rays of any peculiar refrangibility, but rather as residing in the sensorium, by which it is rendered incapable...of appreciating exactly those differences between the rays on which these colours depend.* Difficulty of The permanency or variation of star-tints requires...

...Dalton's vision, and other defects of the same class, to a morbid state of the sensorium, or brain, by which it is rendered incapable of appreciating exactly those differences between rays upon which their colours depend. Mr. "VVortmann, of Geneva, has published an interesting memoir on...