UNITED STATES DEPARTMENT OF AGRICULTURE 
% BULLETIN No. 570 
Contribution from the Bureau of Chemistry 
CARL L. ALSBERG, Chief 
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. 
Page. 
1 
2 
Analysis of rice and its by-products. 
Interpretation of results 
Page. 
4' 
13 
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 TJ. 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 
