12 



BULLETIISr 702, V. S. DEPARTMENT OF AGEICULTUBE. 



candle gives a false impression of the condition of the contents. The 

 inspection of the egg without the aid of the candle is usually suffi- 

 cient to correct this delusion. 



HEATED EGGS INCLUDING HATCH-SPOT EGGS AND WEIAK EGGS. 



"Weak eggs and hatch-spot eggs are characteristic of summer 

 seconds. They formed over 5 per cent of the good eggs found in the 

 rejects. The warmth of the summer weather enables the native 

 enzymes to weaken the structure of the egg, and, if the egg happens 

 to be fertile, a partial development of the embryo also occurs. Be- 

 cause the 3^olk of an egg with a weak vitelline membrane flattens out 

 with each turn before the candle, it is not always easy to determine 

 whether or not the yolk is intact. If the yolk besides being weak 

 shows signs of incubation, it is necessary to determine whether 

 blood is present. A dark shell or a white shell inclosing a light- 

 colored yolk also makes for inaccuracy. If new candlers are not in- 

 structed they invariably throw away hatch-spot eggs because of the 

 darkened area on the yolk. 



EGGS WITH YOLKS FLOATING NEAR SHELLS. 



Eggs with the yolk floating near the shell are frequently mistaken 

 for eggs with slightly adherent yolks, if the candler does not invert 

 each egg to see whether the yolk will move away from the shell. It 

 sometimes happens that the jar of placing an egg with a slightly 

 stuck yolk in the case dislodges the j^olk so that upon recandling 

 it has the appearance of a good egg. About 3 per cent of the good 

 eggs found on recandling rejects were eggs with yolks resting near 

 the shell. 



Table 5. — Accuracij of recandling rejects. 





Number . 

 of eggs 

 broken. 



Total bad eggs found. 



House. 



Average 

 per case. 



Per cent. 



Bad eggs found on breaking good eggs recandled from rejects: 



D 



281 

 1,473 



971 

 1,152 



33.2 

 33.7 



77.85 

 37.5 



9.24 





9.36 



I (period 2) . . 



21.63 





10.41 







Total .. 



3,877 









45.9 



12.75 









Good eggs left in rejects after recandling: 



D 



720 

 3,600 

 3,600 

 3,600 



13 



24.9 

 2.5 

 2.2 



3.5 



E 



6.9 



. I (period 1 ) 



I (period 2) 



.7 

 .6 



Total 



11,520 









11.8 



3.3 







