Poultry laboratory guide ; a manual for the study of practical poultry keeping . ryo as seen on thefourteenth day, marking all the parts. The following is the process of hatching, brieflydescribed. CarefuUy observe same when thechicks are hatching in the incubator. When ready to come out, the chick raises itshead and pierces the inner shell membrane, andimmediately starts breathing the air in the cham-ber, which causes the pulmonary circulation tobecome active and the embryonic circulation tocease. The head is next raised into the air cham-ber, and the chick deals blows upon the sheU,which whe
Poultry laboratory guide ; a manual for the study of practical poultry keeping . ryo as seen on thefourteenth day, marking all the parts. The following is the process of hatching, brieflydescribed. CarefuUy observe same when thechicks are hatching in the incubator. When ready to come out, the chick raises itshead and pierces the inner shell membrane, andimmediately starts breathing the air in the cham-ber, which causes the pulmonary circulation tobecome active and the embryonic circulation tocease. The head is next raised into the air cham-ber, and the chick deals blows upon the sheU,which when often repeated in the same placeresult in fracturing it. This process is repeateduntil the shell is broken around about one thirdof the way from the large end. The chick then 48 POULTRY LABORATORY GUIDE presses its head against the large end and itsfeet against the small end, and then by pushingis able to throw off the shell lid and make itsexit. By observation note the length of time whichit takes for the chick to get free from the shellfrom the time that it starts to ARTIFICIAL BROODING EXERCISE XIV Location and Construction of BrooderHouses The following systems in brooder house designare in common use. (a) Long house. 1. Continuous hover heated by hot-water pipes. 2. Indoor individual brooder, doubleor single, heated by kerosene lamps. 3. Equipped with fireless brooders. (b) Small colony brooder house with indoorbrooder. In long brooder houses the entire house isusually kept at the desired temperature bymeans of wall or ceiling coils of pipes, and thehovers are heated separately. Which of these systems are in use on theplant being studied ? Note the location of the brooder house withreference to the incubator cellar. Is it near athand or at considerable distance? Which isE 49 50 POULTRY LABORATORY GUIDE best, and why? Note the location with refer-ence to the prevaihng wind direction. Are thewindows, doors, and yards so placed as to receiveprotection from the buildin
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectpoultry, bookyear1910
