The Natural Organic Colouring Matters. B
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Ryan, Hugh
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Article
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1919
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Wiley (John Wiley & Sons)
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๐ 1 views
THE NATUnAL OROAXIC COLOUlUSO BfA'lTERS. Bu JlOnog~apks A. G. PERKIS U I I ~ A. El. flVElIEST. 011 ZndirslriaZ C k c ~~i isfru, cdllcd bu Srn ELI. THOIWE. Z'p. xxii + C G . (Lo~rdon: Lorigmcar~j, Grcc1l. Ulld co., 191s.) f'ricc 2%. 1lCt. During the pnst fifty years tlic iiinin trend of organic clie