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Arc. Nat, V. I. 70. Hence it appears, that as the muscles consist of larger fibres
intermixed with a smaller quantity of nervous medulla, the organ of vision
consists of a greater quantity of nervous medulla intermixed with smaller fibres.
... and the centre of this with a circle of indigo, about half an inch in diameter;
make a small speck with ink in the very centre of the whole, as in Plate III. look
steadily for a minute on this central spot, and then closing your eyes, and
applying your ...
So we many times in an hour cover our eye-balls with our eye-lids without
perceiving that we are in the dark; hence the perception or idea of light is not
changed for that of darkness in so small a time as the twinkling of an eye; so that
in this this ...
III. Ofrepeated stimulus. 1. Aftimulus repeated too frequently loses effo. As opium,
wine, grief. Hence old age. Opium and aloes in small doses. 2. Aftimulus not
repeated too frequently does not lose effeo. Perpetual movement of the vital
... but as an illustration or simile to facilitate the conception of a difficult subject.
Let twenty very small Leyden phials properly coated be hung in a row by fine silk
threads at a small distance from each other; let the internal charge of one phial
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LibraryThing ReviewUser Review - Devil_llama - LibraryThing
Written by the grandfather of Charles Darwin, this book is a masterful treatise on the medical disorders and how to treat them. Primarily of interest to people who are interested in the period ... Read full review