BLTC Press Titles

available for Kindle at

Letters on the Aesthetical Education of Man

Friedrich Schiller

Tao Te Ching

Lao Tzu, James Legge (trans.)

Alice's Adventures in Wonderland

Lewis Carroll

Some Experiences of an Irish R. M.

Edith Somerville and Martin Ross

Goethe's theory of colours

by Johann Wolfgang von Goethe


We naturally place these colours first, because they belong altogether, or in a great degree, to the subject*—to the eye itself. They are the foundation of the whole doctrine, and open to our view the chromatic harmony on which so much difference of opinion has existed. They have been hitherto looked upon as extrinsic and casual, as illusion and infirmity: their appearances have been known from ancient date; but, as they were too evanescent to be arrested, they were banished into the region of phantoms, and under this idea have been very variously described.


Thus they are called colores adventicii by Boyle; imaginarii and phantastici by Rizetti; by Buffbn, couleurs accidentelles; by Scherfer, scheinfarben (apparent colours) ; ocular illusions and deceptions

* The German distinction between subject and object is so generally understood and adopted, that it is hardly necessary to explain that the subject is the individual, in this case the beholder; the object, all that is without him.—^T.


of sight by many; by Hamberger, vitia fugitiva; by Darwin, ocular spectra.


We have called them physiological because they belong to the eye in a healthy state; because we consider them as the necessary conditions of vision; the lively alternating action of which, with reference to external objects and a principle within it, is thus plainly indicated.


To these we subjoin the pathological colours, which, like all deviations from a constant law, afford a more complete insight into the nature of the physiological colours.


The retina, after being acted upon by light or darkness, is found to be in two different states, which are entirely opposed to each other.


If we keep the eyes open in a totally dark place, a certain sense of privation is experienced. The organ is abandoned to itself; it retires into itself. That stimulating and grateful contact is wanting by means of which it is connected with the external world, and becomes part of a whole. 7.

If we look on a white, strongly illumined surface, the eye is dazzled, and for a time is incapable of distinguishing objects moderately lighted.


The whole of the retina is acted on in each of these extreme states, and thus we can only experience one of these effects at a time. In the one case (6) we found the organ in the utmost relaxation and susceptibility; in the other (7) in an overstrained state, and scarcely susceptible at all.


If we pass suddenly from the one state to the other, even without supposing these to be the extremes, but only, perhaps, a change from bright to dusky, the difference is remarkable, and we find that the effects last for some time.


In passing from bright daylight to a dusky place we distinguish nothing at first: by degrees the eye recovers its susceptibility; strong eyes sooner than weak ones; the former in a minute, while the latter may require seven or eight minutes.


The fact that the eye is not susceptible to faint impressions of light, if we pass from light to comparative darkness, has led to curious mistakes in scientific observations. Thus an observer, whose eyes required some time to recover their tone, was long under the impression that rotten wood did not emit light at noon-day, even in a dark room. The fact was, he did not see the faint light, because he was in the habit of passing from bright sunshine to the dark room, and only subsequently remained so long there that the eye had time to recover itself.

The same may have happened to Doctor Wall, who, in the daytime, even in a dark room, could hardly perceive the electric light of amber.

... from the RetroRead library, using Google Book Search, and download any of the books already converted to Kindle format.

Browse the 100 most recent additions to the RetroRead library

Browse the library alphabetically by title

Make books:

Login or register to convert Google epubs to Kindle ebooks



Lost your password?

Not a member yet? Register here, and convert any Google epub you wish

Powerd by Calibre powered by calibre