Continuation of an Examination of Rubia munjista, the East-Indian Madder, or Munjeet of Commerce

John Stenhouse
1863 Proceedings of the Royal Society of London  
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more » ... out Early Journal Content at http://about.jstor.org/participate--jstor/individuals/early-journal--content. JSTOR is a digital library of academic journals, books, and primary source objects. JSTOR helps people discover, use, and build upon a wide range of content through a powerful research and teaching platform, and preserves this content for future generations. JSTOR is part of ITHAKA, a not--for--profit organization that also includes Ithaka S+R and Portico. For more information about JSTOR, please contact support@jstor.org. 1864.] Dr. Stenhouse on Rubia munjista. 145 is rather hinted at than described, I caln only conjecture what the sub.stance is; but I suppose it to be a mixture of the second yellow substance with the products of decompositioni of the other three bodies. Green seaweeds (Chlorospermew) agree with land-plants, except as to the relative proportion of the substances present; but in olive-coloured sea-weeds (Melanospermece) the second green substance is replaced by a third green substance, and the first yellow substance by a third yellow substance, to the presence of which the dull colour of those plants is due. The red colouringmatter of the red sea-weeds (JRhodosperrnetv), which the plants colntain in addition to cblorophyll, is altogether ;different in its nature from chlorophyll, as is already knowni, and would appear to be an albuminous substanice. I hope, before long, to present to the Royal Society the details of these researches.
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