...In eggsin the yolk plug stage of development, the diameter of the embryo is about2... 
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...The externalgills are moderately long, slender, and filamentous; the yolk sac is still moderatelylarge...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...Theserudimental eggs have as yet no shell or white, these being exhibited ina different stage of development; but consist wholly of yolk, on thesurface of which the germ of the future chicken lies...
Robert Jennings 「Sheep, Swine, and Poultry」
...The function of thechalazæ is to keep the yolk suspended in the center of the egg...
John H. Robinson 「Our Domestic Birds」
...Meroistic: ovaries that secrete yolk or vitellaginouscells as well as ova...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Remove a part of the white at the top, uncovering a little of the yolk...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...And so the people of my part, struck by the resemblance, call this mushroom lou rousset d'iou, or, in other words, yolk of egg...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...Eggs in the yolk plug stage have diameters of 1...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...There is a moderate amount of yolk, but this does not form a large ventral bulge...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...Subsequentretraction or rupture of the yolk sac and closure of the navelare accompanied by a decrease in height of shell and slight, furtherwidening of the carapace...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...When hatching is completed, the yolk sac usuallyprotrudes no more than two millimeters, but in some individualsit is large and retracts slowly over a period of several days...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...I carried him indoors, and "mothered" the littlehelpless thing as well as I could, by feeding himwith hard-boiled yolk of egg mixed with brownbread and water...
Elizabeth Brightwen 「Wild Nature Won By Kindness」
...Add a little cream and the beaten yolk of one egg...
Various 「Armour's Monthly Cook Book, Volume 2, No. 12, October 1913」
...Brush with the beaten yolk of egg, milk or cream andbake one half hour...
Various 「Armour's Monthly Cook Book, Volume 2, No. 12, October 1913」
...The spaces between the oval marks were covered with white down and feathers, stuck on with the yolk of a turtle's egg, as I judged by the gluten and by the shell lying near the place...
Matthew Flinders 「A Voyage to Terra Australis Volume 2」
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