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UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 391 
Contribution from the Bureau of Chemistry 
CARL L. ALSBERG, Chief 

Washington, D. C. PROFESSIONAL PAPER December 10, 1918 
ACCURACY IN COMMERCIAL GRADING 
OF OPENED EGGS 
M. E. JENKINS, Assistant Bacteriologist, and 
NORMAN HENDRICKSON, Assistant Chemist, 
Food Research Laboratory 
CONTENTS 
Introduction 
Purpose, Plan, and Extent of Investiga- 
tion 
History and Bacterial Content of Samples 
Effect of Condition of Shell on Bacterial 
Content of Egg 
Relation between Number of Bacteria 
and Physical Condition of the Egg 
Contents 
11 
Page 
Descriptions and Bacterial Counts of 
Eggs Graded out of the Shell .... 14 
Effect of Contaminated Eggs upon Com- 
posite Products 18 
Eggs Rejected during Grading .... 21 
Summary 25 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1918 
