} UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 183 
Contribution from the Bureau of Plant Industry 
WM. A. TAYLOR, Chief 
i'ashington, D. C. PROFESSIONAL PAPER April 13, 1915 
MORPHOLOGY OF THE 
BARLEY GRAIN WITH REFERENCE TO 
ITS ENZYM-SECRETING AREAS 
By 
ALBERT MANN, Plant Morphologist, and H. V. HARLAN, 
Bee in Charge of Barley Investigations 
CONTENTS 
\ 
Function of the Aleurone Layer . . . 
Greater Diastatic Power of Small-Berried 
and High-Nitrogen Barleys . . . ». « 
Efficiency of Conversion 
American Barleys 
Modifications Possible by Culture . . 
Foreign Barleys 
Summary .. . . e« 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1915 
