. Artificial incubation and incubators ... ht. The yolkowing to the rapid ab-From this to the tenthvery rapidly; the bonesflesh appearing onthe eleventh day, ifappears as shown atteenth day the toe-nailsformation of the scales Fig. 7. On the thir-appear and also the *IG- on the toes; the feather-sacs have sufficiently developed to showthe color of the coming chick. The fifteenth day a change ofposition takes place, the chick lying lengthwise in the shell; pre-vious to this, the embryo has lain as formed—crosswise; the billopens and closes, and distinct motions of the wings and legs maybe seen.
. Artificial incubation and incubators ... ht. The yolkowing to the rapid ab-From this to the tenthvery rapidly; the bonesflesh appearing onthe eleventh day, ifappears as shown atteenth day the toe-nailsformation of the scales Fig. 7. On the thir-appear and also the *IG- on the toes; the feather-sacs have sufficiently developed to showthe color of the coming chick. The fifteenth day a change ofposition takes place, the chick lying lengthwise in the shell; pre-vious to this, the embryo has lain as formed—crosswise; the billopens and closes, and distinct motions of the wings and legs maybe seen. By the close of the sixteenth day the white of the egg hasentirely disappeared. The yolk-sack connected to the chick by theumbilical cord lies loose between the body of the chick and the FINAL DEVELOPMENT. 23 shell-membrane, until the nineteenth or twentieth day, when it isdrawn into the abdomen of the chick. Fig. 8 shows the appearance of the chick on the nineteenth daywith the yolk-sack not fully absorbed. And Fig. 9, the chick as he. Fig. 8. lies folded in the shell just previous to exclusion. About this stagethe chick pierces the membrane with his bill and begins to breath theair contained in the air-cell. The development from this time is veryrapid. The blood ceases to flow through the outer membranes,which shrivel and dry up, the egg-sack is entirely absorbed, and the loosened end Fig. 9. flies off: resting a few moments, he gives one or two more vigorous kicks, whichclears him from the shell, after leaving it in the condition shown atFig. 11, and he begins his active life. Here we will leave him forthe present. The fertility of the egg depends on a number of number of hens allowed to each cock, the size and vigor of 24 FERTILITY. the male, the breed of fowls, and sometimes on the individual bird. With Leghorns, Hamburghs, Houdans, Games, and other small-bodied birds, from twelve to twenty hens to one cock will usuallyensure fertile eggs; while with C
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectincubat, bookyear1883
