. Our domestic birds; . As thegerm grows, thecontents of the eggbecome clouded anddense, and the airspace at the largeend of the egg isclearly defined, thedensity being greatest near it. From the time that the egg be-comes dense, observations of development must be made bybreaking one or more eggs daily or every few days, accordingto the number available for observation. The embryo grows until it fills the egg. The mere applicationof heat to the egg has gradually transformed that little germand the yellow and white of egginto bones, flesh, skin (and, insome cases, down), and all theorgans of a
. Our domestic birds; . As thegerm grows, thecontents of the eggbecome clouded anddense, and the airspace at the largeend of the egg isclearly defined, thedensity being greatest near it. From the time that the egg be-comes dense, observations of development must be made bybreaking one or more eggs daily or every few days, accordingto the number available for observation. The embryo grows until it fills the egg. The mere applicationof heat to the egg has gradually transformed that little germand the yellow and white of egginto bones, flesh, skin (and, insome cases, down), and all theorgans of a living the embryo has filled theshell, it lies curled up, usuallywith the head at the large endof the egg and the beak almosttouching the shell, at about onethird of the distance from thelarge to the small end of the egg. At the point of the beak of the young bird on the curvedtip of the upper mandible is a small horny scale. Without thisscale it would be hard for the embryo to break the shell because it. Fig. ii. Light Brahma (day old) CHARACTERS AND HABITS OF BIRDS 23 cannot, as it lies, strike it a direct blow with the point of its scale is a remarkable character. Its only use is to help thebird out of the shell. A few days after exclusion it disappears. If you take a hens egg about the eighteenth or the nine-teenth day of incubation and hold it closely in your hand, youmay be able to feel the chick move. If your hand is a little bitcold, the chick is much more likely to squirm in the egg andmay utter a peep. If, with the egg in a warm hand, you hold itto your ear, you will about this time hear an occasional tap,tap, caused by the chicken striking its beak against the tapping is kept up more or less steadily until the shellcracks where the point of the beak strikes it and a little pieceis broken out. The chick usually rests awhile now, — perhapsfor some hours, — then resumes the attack on the shell. It turnsin the shell, breaking out li
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Keywords: ., bookcentury1900, bookdecade1910, bookidourdomesticb, bookyear1913
