U. S. DEPARTMENT OF AGRICULTURE 
BUREAU OF ANIMAL INDUSTRY— BULLETIN No. 47, HART II. 
D. E. SALMON, D. V. M., Chief of Bureau. 
THE HOG INDUSTRY 
SELECTION, FEEDING, AND MANAGEMENT. 
RECENT AMERICAN EXPERIMENTAL WORK. 
STATISTICS OF PRODUCTION AND TRADE. 
BY 
GEORGE M. ROMMEL, B. S. A., 
EXPERT IN ANIMAL HUSBANDRY, BUREAU OF ANIMAL INDUSTRY. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1904. 
