THE COCK. I/* 



Progress of the incubation. 



motion is observed. At the end of seven hours 

 more, the lungs and stomach become visible; 

 and, four hours after this, the intestines, the 

 loins, and the upper jaw. At the hundred and 

 forty-fourth hour, two ventricles are visible, and 

 two drops of blood, instead of the single one 

 which was seen before. The seventh day, the 

 brain begins to have some consistence. At the 

 hundred and ninetieth hour of incubation, the 

 bill opens, and the flesh appears in the breast; 

 in four hours more, the breast-bone is seen ; and 

 in six hours after this, the ribs appear forming 

 from the back, and the bill is very visible, as 

 well as the gall-bladder. The bill becomes green 

 at the end of two hundred and thirty-six hours ; 

 and if the chicken is taken out of its coverings, it 

 evidently moves itself. The feathers begin to 

 shootout towards the two hundred and fortieth 

 hour, and the skull becomes gristly. At the two 

 hundred and sixty-fourth hour, the eyes appear, 

 At the two hundred and eighty-eighth, the ribs 

 are perfect. At the three hundred and thirty- 

 first, the spleen draws near the stomach, and the 

 lungs to the chest. Aybe end of three hundred 

 and fifty-five hours, the bill frequently opens and 

 shuts; and at the end of the eighteenth day, the 

 first cry of the chicken is heard. It afterwards 

 gets more strength, and grows continually, till at 

 length it is enabled to set itself free from its con- 

 finement. 



VOL iv. NO. 24. C 



