[83] Franz, "The Eye, a treatise on preserving this organ in a healthy state and improving the sight." London, Churchill, 1839, pp. 34-36.
[84] Haslam's "Observations on Madness and Melancholy," 2nd ed. p. 192.
[85] Flourens, "De la vie et de l'Intelligence," 2nd edition, Paris, Garnier Frères, 1852, p. 49.
[86] "It is the mind that sees and hears; all besides is deaf and blind." (Tr. Ad.)
[87] Plutarch, "De solert. animal." c. 3. "For the affection of our eyes and ears does not produce any perception, unless it be accompanied by thought." (Tr. Ad.)
[88] "Straton, the physicist, has proved that 'without thinking it is quite impossible to perceive.'" (Tr. Ad.)
[89] "Therefore it is necessary that all who perceive should also think, since we are so constituted as to perceive by means of thinking." (Tr. Ad.)
[90] Porph. "De abstinentia," iii. 21.
[91] Compare "Die Welt a. W. u. V." 3rd edition, vol. ii. p. 41. [The 3rd edition of "Die Welt a. W. u. V." contains at this place a supplement which is wanting in the 2nd edition, vol. ii. p. 38.—Note by the Editor of the 3rd edition.]
[92] Kant, "Krit. d. r. V." 1st edition, p. 367 sqq. (English translation by M. Müller, p. 318 sqq.)