. Chemical embryology. Embryology. .£*>^'^. YOLK OF HEN'S EGG AT THE ELEVENTH DAY OF INCUBATION Stained with iodine, showing its very heterogeneous character half-way through development. Note especially the large vacuoles filled with fluid contents. Magnifica- tion 6 X A, prepared and microphotographed by Dr V. 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 Needham, Joseph, 1900-. New York: The MacMillan Co.

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Keywords: ., bookcentury1900, bookpublishernewyorkthem, booksubjectembryology