The diseases of poultry (1899) The diseases of poultry diseasesofpoultr00salm Year: 1899 DISEASKS OF POULTRY 145 Fi!j. 35. Fig-. 36. Fig'. 34.—Egrjr from upper part of oviduct with coating' of dense albumetr called menibrana clialazifera continued into the clialazK. Fisr- 35. — Out- stretched chalaz;E from opposite sides of the _yolk showing' opposite turns of the spiral. Fig'. 30—Eg'g' from above middle of oviduct with first layers of soft albumen. upper portion of the oviduct aud soon after the egg' escapes from the ovary. Having entered the oviduct the ovum is propelled with a rotary m
The diseases of poultry (1899) The diseases of poultry diseasesofpoultr00salm Year: 1899 DISEASKS OF POULTRY 145 Fi!j. 35. Fig-. 36. Fig'. 34.—Egrjr from upper part of oviduct with coating' of dense albumetr called menibrana clialazifera continued into the clialazK. Fisr- 35. — Out- stretched chalaz;E from opposite sides of the _yolk showing' opposite turns of the spiral. Fig'. 30—Eg'g' from above middle of oviduct with first layers of soft albumen. upper portion of the oviduct aud soon after the egg' escapes from the ovary. Having entered the oviduct the ovum is propelled with a rotary motion by the peristaltic contractions of that tube, towards the cloaca. The contact of the ovum stimulates the lin- ing membrane of the oviduct to secrete first a dense layer of albumen which is deposited upon the vitelline membrane and is continued thread-like from each pole. These threads or filaments are the chalazcz and the dense layer of albumen with which they are connected is the vicmbrana chalazifera. As the o rotates in the oviduct the chalazce become twisted in opposite directions, and the one next the small end of the egg finally adheres more or less to the membrane lining the shell at tat point.
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