 | 1861 - Страниц: 716
...of transparent tissue, with a nerve sensitive to light beneath, and then suppose every part of this layer to be continually changing slowly in density,...form. Further, we must suppose that there is a power always intently watching each slight accidental alteration in the- transparent layers, and carefully... | |
 | 1860 - Страниц: 890
...of transparent tissue, with a nerve sensitive to light beneath, and then suppose every part of this layer to be continually changing slowly in density,...form. Further, we must suppose that there is a power always intently watching each slight accidental alteration which, under varied circumstances, may in... | |
 | Charles Darwin - 1861 - Страниц: 470
...of transparent tissue, with a nerve sensitive to light beneath, and then suppose every part of this layer to be continually changing slowly in density,...form. Further we must suppose that there is a power always intently watching each slight accidental alteration in the transparent layers; and carefully... | |
 | 1861 - Страниц: 842
...of transparent tissue, with a nerve sensitive to light beneath, and then suppose every part of this layer to be continually changing slowly in density,...to separate into layers of different densities and thickne>seB, placed at different distances from each other, and with the surfaces of each 'layer slowly... | |
 | Charles Darwin - 1864 - Страниц: 472
...of transparent tissue, with a nerve sensitive to light beneath, and men suppose every part of this layer to be continually changing slowly in density,...form. Further we must suppose that there is a power always intently watching each slight accidental alteration in the transparent layers; ana carefully... | |
 | Henry A. DuBois - 1866 - Страниц: 112
...nerve sensitive to light beneath, and then suppose every part of this layer to be continually changing in density, so as to separate into layers of different...form. Further, we must suppose that there is a power always intently watching each slight accidental alteration in the transparent layers ; and carefully... | |
 | Paul Janet - 1866 - Страниц: 216
...nerve sensitive to light beneath, and then suppose every part of this layer to be continually changing in density, so as to separate into layers of different...surfaces of each layer slowly changing in form."* What a number of suppositions and of coincidences we must admit here ! But, even if we grant these... | |
 | Charles Darwin - 1866 - Страниц: 668
...filled with fluid, and with a nerve sensitive to light beneath, and then suppose every part of this layer to be continually changing slowly in density, so as to separate into layers of diiferent densities and thicknesses, placed at different distances from each other, and with the surfaces... | |
 | Paul Janet - 1867 - Страниц: 214
...nerve sensitive to light beneath, and then suppose every part of this layer to be continually changing in density, so as to separate into layers of different...surfaces of each layer slowly changing in form."* What a number of suppositions and of coincidences we must admit here ! But, even if we grant these... | |
 | Robert Mackenzie Beverley - 1867 - Страниц: 406
...filled with fluid, and with a nerve sensitive to light beneath, and then suppose every part of this layer to be continually changing slowly in density...placed at different distances from each other, and with surfaces of each layer slowly changing in form. Farther, we may suppose that there is a power, Natural... | |
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If we must compare the eye to an optical instrument, we ought in imagination to take a thick layer of transparent tissue, with spaces filled with fluid, and with a nerve sensitive to light beneath, and then suppose every part of this layer to be continually... 
