1204 Stoward.—Amyloclastic Secretory Capacities of Hordeum. 
as a means of determining the amylase content of a plant organ or tissue, 
is probably not of wide application. 
6. Cane sugar inhibits the secretion of amylase by the embryo, dextrose 
diminishes it, but invert sugar has apparently no influence on the 
phenomenon. 
7. The suggestion that the amylase which arises as secretions of the 
embryo and aleurone layer may activate that of the inner endosperm is not 
supported by experimental evidence. 
In conclusion, I desire to express my deep thanks to Professor Adrian 
J. Brown, F.R.S., for his generous and helpful advice, guidance, and criticism, 
and also for the many facilities he has afforded me during the conduct of this 
investigation. My best thanks are also due to Messrs. T. H. Pope, B Sc., 
and Ch. Evans, B.Sc., who have been good enough from time to time to 
offer many valuable suggestions and criticisms. 
Department of the Biology and Chemistry of Fermentation, 
University of Birmingham. 
