. Poultry production. Poultry. 240 POULTRY PRODl'CTION unusually cool nights, which are likely to produce crowding if a little extra heat is not supplied. The thermometers used should be carefully tested at the beginning of each season, if they are to be relied upon, just as in the case of incul)ators. I-'i.;. 119. .t« , 1 Hum 1 in Inn „aoinii| 1 iistd i(iiintts\ ol K nj^ 1^ \ jiuultui ]1 L\i ( niiii lit st iiion ) Effect of ChiUiiig.—k little chick compelled to remain in the cold after he begins to feel chilly, soon becomes helpless. This is apparently caused by the paralysis o
. Poultry production. Poultry. 240 POULTRY PRODl'CTION unusually cool nights, which are likely to produce crowding if a little extra heat is not supplied. The thermometers used should be carefully tested at the beginning of each season, if they are to be relied upon, just as in the case of incul)ators. I-'i.;. 119. .t« , 1 Hum 1 in Inn „aoinii| 1 iistd i(iiintts\ ol K nj^ 1^ \ jiuultui ]1 L\i ( niiii lit st iiion ) Effect of ChiUiiig.—k little chick compelled to remain in the cold after he begins to feel chilly, soon becomes helpless. This is apparently caused by the paralysis of the breathing apparatus. The lungs are located on either side of the median line of the back at the circumference of the body cavity. Lobes of the lungs extend between the ribs and are protected from the outside temperature only by a thin membrane, the skin, and a coat of down. It is not surprising that when the chick is chilled the lungs are quickly afl'ected, breathing power restricted, and a general enfeeblement of the powers of movement ensues. In natural brooding, the back and lungs are the best protected portions of the body. When a chick becomes. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lippincott, William Adams, 1882-1931; Card, Leslie Ellsworth, 1893-. Philadelphia, Lea & Febiger
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpoultry, bookyear1921
