The five gateways of knowledge / by George Wilson.

  • Wilson, George, 1818-1859.
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: The five gateways of knowledge / by George Wilson. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    see it projecting with a bent surface like a bow-window, and may observe its perfect transparency. The eyelids, which I have formerly spoken of as a curtain, may per- haps be better compared to a pair of outside shutters for this window, which are put up when we go to sleep, and taken down when we awake. But these shutters are not use- less, or merely ornamental through the day. Every moment they are rising and falling, or, as we say, winking. We do this so unceasingly, that we forget that we do it at all; but the object of this unconscious winking is a very important one. An out- side window soon gets soiled and dirty, and a careful shopkeeper cleans his windows every morning. But our eye-windows must never have so much as a speck or spot upon them, and the winking eyelid is the busy apprentice, who, not once a day, but all the