On the photochemistry of the retina and on visual purple / translated from the German of W. Kühne ; edited, with notes, by Michael Foster.

  • Kuhne, W, 1851-1930.
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: On the photochemistry of the retina and on visual purple / translated from the German of W. Kühne ; edited, with notes, by Michael Foster. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    APPENDIX. Since the foregoing text was publisTied, and during the time the ti'anslation has been in preparation, investigations have been earnestly carried on by Prof. Kiihne and his school, the results of which have been published in the Untersuchimgen aus dem Physiologischen Institute cler Universitdt Heidelberg. Heidelberg, Carl. Wintei-, 1877—1878. To translate the whole of these would have made this little treatise far too bulky. I have therefore added, in the shape of notes, brief accounts of some of the most striking results of these inquii'ies. They will serve it is hoped to fill up gaps in the text, as well as to indicate the directions in which progress continues to be made; in some instances, it will be seen that further inquiry has not corroborated the impressions first made ; but in many other instances, the later experimental confirmation of early guesses is veiy happy.- M. F. KoTE A. p. 5 *. Chamois. This colour, the name of which, derived from its being one of the tints visible in the skin of the chamois, is probably mxfamiliar to the English reader, deserves some little attention. Like purple it is not a spectral colour, but it has the same claims as purple to be recognized as a distinct sensation. Chamois is a mixtvire of violet (or purple) with yellow; and various shades of chamois may be obtained by varying the admix- ture of white light with the above two colours. Violet and pure