EGGS AND INCUBATION 



355 



uniform size and condition. Hatchings will be likely to be 

 more uniform if the eggs are of much the same age and con- 

 dition of keep previous to setting. 



The size and weight of eggs vary more than many sup- 

 pose. Professor Lewis gives* some interesting figures about 

 the size and weight of eggs of dif- 

 ferent breeds of fowls. The eggs 

 of seven different breeds showed 

 an average large circumference 

 of 6.19 inches, a small circumfer- 

 ence of 5.27 inches, and an aver- 

 age weight of 1 pound, 8.05 ounces. 

 The eggs from the hens were 

 slightly larger and weighed a trifle 

 more than those from the pullets. 

 A dozen Plymouth Rock eggs 

 weighed 1 pound, 11,2 ounces; 

 the Leghorns ranking second at 1 

 pound, 10.3 ounces. In a bulletin 

 published by the Ohio State Uni- 

 versity,! it was shown that in 

 sorting over a case of eggs, a doz- 

 en of the largest ones weighed 

 30 Y% ounces, the medium sized 26J/2 

 ounces, and the small ones 21% 

 ounces. On this basis it was fig- 

 ured that a case of 30 dozens of large eggs would weigh 

 57 pounds, 3 ounces, while the small ones would weigh 

 but 40 pounds, 12 ounces, an astonishing difference. The 

 Leghorn naturally produces small eggs, and the Minorca 

 large ones, and figures in the bulletin referred to give a 



Fig. 194. Notice the dif- 

 ference in size of these eggs. 

 Photograph by courtesy Ohio 

 State University College of 

 Agriculture. 



Poultry Laboratory Guide, 1910. p. 16. 

 VThe Marketing of Eggs, April, 1911, p. 16. 



