BULLETIN 565, U. S. DEPARTMENT OF AGRICULTURE. 
be seen only by the aid of a microscope. The beating of the egg white 
brings about the incorporation of air into this fine network of fibers. 
TOP 
BOTTOM 
iH^ 
TRONT 
6 
JO 
y Note - All tTa except- support- ECG CANDLE. 
inside bright; outside bJa ' 
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Fig. 3. — Working drawings for a one-hole spout candle. (Reproduced from Bui. 5, 
Missouri State Poultry Experiment Station and U. S. Department of Agriculture, 
Bureau of Chemistry.) 
Between the white and the shell are two fibrous membranes. When 
the egg is first laid, the contents fill the entire shell. On cooling. 
