LETTER OF TRANSMITTAL. 
U. S. DEPARTMENT OF AGRICULTURE, 
DIVISION OF AGROSTOLOGY, 
Washington, D. C., March 28, 1900. 
Sır: I have the honor to transmit herewith a revised copy of Bul- 
letin 19, of this Division, entitled The Structure of the Caryopsis of 
Grasses with reference to their Morphology and Classification, by 
P. Beveridge Kennedy, Ph. D., and recommend the publication of a 
second edition, the first edition being entirely exhausted. This paper 
contains much of histological interest, but is of special value on account 
of the important facts brought out in the investigations relative to the 
morphology and classification of grasses. 
Respectfully, 
F. Lamson- doin; 
Agrostologist. 
Hon. James WILSON, 
Secretary af Agriculture. 
