LETTER OF TRANSMITTAL 
Honolulu, Hawaii, August 4, 1913. 
Sir: I have the honor to submit herewith, and to recommend for 
publication as Bulletin 33 of the Hawaii Experiment Station, a paper 
on The Organic Nitrogen of Hawaiian Soils, by W. P. Kelley, chemist, 
and Alice R. Thompson, assistant chemist. On account of the great 
importance of nitrogen to growing plants it is highly desirable to know 
more about the nature of the nitrogenous substances in soils. In the 
research which served as a basis for the present bulletin an attempt 
was made to determine, so far as possible, the forms in which nitrogen 
occurs in the soils, and the relative percentages of the various nitrog- 
enous products. These studies furnish an important contribution to 
the subject, which will later be supplemented by a study of the 
products of various vegetable proteids when acted upon by bacteria. 
Respectfully, 
E. V. Wilcox, 
Special Agent in Charge. 
Dr. A. C. True, 
Director Office of Experiment Stations, 
U. S. Department of Agriculture, Washington, D. C. 
Publication recommended. 
A. C. True, Director. 
Publication authorized. 
D. F. Houston, Secretary of Agriculture. 
(3) 
