LETTER OF TRANSMITTAL 
U. S. Department of Agriculture, 
Office of Experiment Stations, 
Washington, D. C, June 00, 1903. 
Sir: I have the honor to transmit herewith a report of investiga- 
tions among fruitarians carried on at the Agricultural Experiment 
Station of the University of California in 1901-2 by M. E. Jaffa, assist- 
ant professor of agriculture at the University of California, and 
recommend that it be published as Bulletin No. 132 of this Office. 
The special object of this and the earlier work which it continues 
was a study of the value of fruits and nuts when these articles consti- 
tute an integral part of the diet. Nine dietary studies and thirty-one 
digestion experiments were carried on. In the majority' of the dietary 
studies and all but one of the digestion experiments fruit and nuts 
constituted all or almost all of the diet. The results of the investiga- 
tion emphasize the fact that both fruit and nuts should be considered 
as true foods rather than food accessories, a fact which is common^ 
overlooked. 
Credit is due Prof. G. E. Colby and Mr. C. A. Friebel for assistance 
in the chemical work incidental to this investigation. 
Respectfully, 
A. C. True, 
Director. 
Hon. James Wilson, 
Secretary of Agriculture. 
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