28 Scientific Proceedings, Royal Dublin Society. 



In conclusion it must be pointed out that the factors that operate in 

 bringing about the synthesis of sucrose in the plant cell are still very 

 obscure. (Robertson, Irvine, and Dobson (8).) 



Hudson's (4) work has rendered it improbable that invertase in aqueous 

 solution possesses this property. 



LlTEEATUKE. 



1. Benedict, S. E. : A Method for the Estimation of Eeducing Sugars. 



Journ. of Biol. Chem., 1911, vol. ix, p. 57. 



2. Brown, H. T., and Morris, G. H. : A Contribution to the Chemistry and 



Physiology of Foliage Leaves. Journ. of Chem. Soc, Trans., May, 

 1893, vol. lxiii, p. 604. 



3. Campbell, A. V. : Carbohydrates of the Mangold Leaf. Journ. of Agric. 



Science, Jan., 1912, vol. iv, Pt. 3, p. 248. 



4. Hudson, C. S. : Inversion of Sucrose by Invertase. Journ. of Amer. Chem. 



Soc, July, 1914, vol. xxxvi, No. 7, p. 1566. 



5. Kastle, J. H., and Clarke, Mart E. : Amer. Chem. Journ., 1903, 



vol. xxx, pp. 422-427. 



6. Marchal, El. et Em. : Eecherches Physiologiques sur l'amidon chez les 



Bryophytes. Bulletin de la Soc. Eoy. de Bot. de Belgique, 1906, 

 T. xliii, pp. 115-214. 



7. Parkin, J. : The Carbohydrates of the Foliage Leaf of the Snowdrop, and 



their Bearing on the First Sugar of Photosynthesis. Biochemical 

 Journ., 1911, vol. vi, Pt. i, p. 1. 



8. Robertson, R. A. ; Irvine, J. C. ; and Dobson, M. E. : A polarimetric 



study of the sucroclastic enzymes of Beta vulgaris. Bio-chem. Jour., 

 1909, vol. iv, p. 258. 



9. Ruhland, W. : Untersuchung iiber den Kohlenhydraten von Beta vulgaris. 



Jahrb. f. wiss. Bot., 1912, Bd. 1, S. 200-257. 



10. Strakosch, S. : Ein Beitrag zur Kenntniss des Kohlenhydratstoff- 



wechsels von Beta vulgaris. Stzb. d. Kais. Akad. d. Wiss. in Wien, 

 Math-Naturwiss. Klasse, Juni, 1907. Bd. cxvi, Abt. 1, S. 855. 



11- Tansley, A. G., and Chick, E. : Notes on the Conducting Tissue-System 

 in Bryophyta. Ann. of Bot., 1901, vol. xv, p. 1. 



12. Visser, A. W. : Reaktionsgeschwindigkeit und Chemische Gleichgewicht, 

 in homogenen Systemen und deren Anwendung auf Enzymwirkun- 

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