UNITED STATES DEPARTMENT OF AGRICULTURE 





% BULLETIN No. 570 



Contribution from the Bureau of Chemistry "^S 



CARL L. ALSBERG, Chief ^^"^Ql. 



Washington, D. C. 



August 11, 1917 



THE BY-PRODUCTS OF RICE MILLING. 1 



By J. B. Reed, Assistant Chemist, Miscellaneous Laboratory, and F. W. Liepsner, 

 Chemist in Charge, New Orleans Food and Drug Inspection Laboratory. 2 



Introduction 



Description of the milling process . 



CONTENTS. 



Analysis of rice and its by-products. 

 Interpretation of results 



INTRODUCTION. 



Most of the rice produced in the United States is grown and milled 

 in the States of Louisiana, Texas, Arkansas, and California. A few 

 mills also are under operation in North Carolina, South Carolina, and 

 Georgia. Although the processes employed in rice milling are old 

 in principle, a marked improvement has taken place in the industry 

 during the past decade. As the industry is carried on in such a 

 limited area of the country, however, these processes are probably un- 

 familiar to many people who do not live in the rice-growing sections. 

 A description of the rice grain as it comes to the mills and of the 

 essential steps in rice milling seems, therefore, a desirable preliminary 

 to a discussion of rice by-products. 



The three varieties of rice commonly grown in the Louisiana, Texas, 

 and Arkansas rice districts are: Japan, Honduras, and Blue Rose. 

 The Japan type has a short, thick grain, the Honduras type has a 

 long kernel, while the Blue Rose type is intermediate between these 

 two in size. The Blue Rose type, although of comparatively recent 

 introduction, has increased rapidly in popularity because of its 

 productiveness and milling qualities. 



1 This bulletin gives the results of an investigation of the rice-milling industry, conducted with special 

 reference to the by-products obtained in the milling of rice. It should be of interest to rice millers, feed- 

 control officials, feed manufacturers dealers, and feeders of stock. 



2 Acknowledgment is made to F. B. Wise, of the Bureau of Plant Industry, and A. W. Broomell, 

 formerly of the Bureau of Chemistry, for the use of descriptive matter from U. S. Dept. Agr. Bui. 330, 

 and to P. B. Yost and F. L. Elliot, of the New Orleans Laboratory of the Bureau of Chemistry, for 

 assistance in the analytical work. 



100859°— Bull. 570—17 



