UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 565 
Contribution from the Bureau of Chemistry 
CARL L. ALSBERG, Chief 
Washington, D. C. 
May 11, 1918 
HOW TO CANDLE EGGS 
By 
M. E. PENNINGTON, Chief, Food Research Laboratory 
M. K. JENKINS, Assistant Bacteriologist 
and H. M. P. BETTS, Artist 
CONTENTS 
Page 
Introduction 1 
Grading of Eggs 2 
The Egg Candle 2 
The Structure of the Egg 3 
Page 
How to Hold an Egg When Candling . . 5 
What to Look for in Candling an Egg . . 6 
Classified Description of Eggs Before the 
Candle and Out of the Shell 12 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1918 
