40 CARBON ASSIMILATION [ch. iv 



REFERENCES 



liOOKS 



1. Willstatter, R., und StoU, A, Untersucliungeu iiber Clik)roi)liyll. 

 Metlioden und Ers^cbn is.se. Berlin, 1913. 



Papers 



2. Jorgensen, I., and Kidd, P. Some Photochemical Experiments with Pure 

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 1917, B Vol. 89, pp. 342-361. 



3. Jorgensen, I., and Stiles, W. Carbon Assimilation. A Review of Recent 

 Work on the Pigments of the Green Leaf and the Processes connected with them. 

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4. Schryver, S. B. The Photochemical Formation of Formaldehyde in (ireeu 

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5. Usher, P. L., and Priestley, J. H. A Study of the Mechani.sm of Carbon 

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