130 AROMATIC COMPOUNDS [ch. 



REFERENCES 



Books 



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2. Perkin, A. G., and Everest, A. B. The Natural Organic Colouring 

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3. Wheldale, M. The Anthocyanin Pigments of Plants. Cambridge, 1916. 



Papers 



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18. Perkin, A. G., and Phipps, S. Notes on some Natural Colouring Matters. 

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19. Perkin, A. G., and Wilkinson, E. J. Colouring Matter from the 

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