Third annual catalogue of the Cyphers Incubator Co . aid to be definitelyestablished, and the loops of intestine, whichhave hitherto been hanging down, are drawn upinto the abdomen. The body of the embryo istherefore completed, but it still remains con-nected with its various appendages by a narrowumbilicus {Fig. 5, um) in which run the stalk ofthe allantois and the solid cord suspending theyolk-sac. The allantois still growing rapidly, itcompletely surrounds the whole contents of theegg, except at the poll opposite to the embryo,where for some little time a small portion of albu-men remains u
Third annual catalogue of the Cyphers Incubator Co . aid to be definitelyestablished, and the loops of intestine, whichhave hitherto been hanging down, are drawn upinto the abdomen. The body of the embryo istherefore completed, but it still remains con-nected with its various appendages by a narrowumbilicus {Fig. 5, um) in which run the stalk ofthe allantois and the solid cord suspending theyolk-sac. The allantois still growing rapidly, itcompletely surrounds the whole contents of theegg, except at the poll opposite to the embryo,where for some little time a small portion of albu-men remains unenclosed ; at this spot the dimin-ished white of the egg adheres as a dense viscidplug. The allantois lies over the embryo, close underthe shell, being separated from the shell mem-brane by nothing more than a thin membraneformed out of the outer primitive fold of theamnion and the remains of the vitelline mem-brane. With this membrane the allantois par-tially coalesces, and in opening an egg at thelatter stage of incubation, unless care be taken,. Fig. 6.—A diagrammatic section through a fowls egg about six-teen days incubated ; a!, cavity of the allantois. The allantois nowcompletely envelops the embryonic and yolk-sacs, and the remain-ing portion of albumen, alb. The amnion, am, is loosing fluid, andvery closely envelops the embryo, while the , is seen foldedover it. The allantois becomos thinner and thinner as incubationprogresses, so that at the last its two walls lie in direct contact, thefluid and cavity entirely disappearing. 2 THE CYPHERS INCUBATOR COMPANY the allantois is in danger of being torn in theremoval of the shell membrane. On about the sixteenth day the allantois iscarried right over the pole of the yolk oppositethe embryo, and is thus completed. Deposits of urates now become abundant in
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpoultryfeedingandfee
