Abstract
IN NATURE of November 9 Dr. Rendle directs attention to a method of producing compounds of chlorophyll and copper similar in colour to that of the natural pigments of the leaf and of a comparatively stable nature. It may be worth while to point out that the chemical changes underlying the method are fairly well known, as a result of Willsttter's investigations of chlorophyll and its derivatives. The knowledge derived from Willsttter's work forms a very profitable basis for an investigation of the problem of preserving the colour of herbarium specimens.
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JRGENSEN, I. The Preservation of Natural Colour in Plants . Nature 98, 229 (1916). https://doi.org/10.1038/098229a0
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DOI: https://doi.org/10.1038/098229a0
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