. Chemical embryology. Embryology. 5o6 ON INCREASE IN SIZE [PT. Ill only held for the two echinoderms studied and not for the frog, thus: Cleavage stages Later stages Sphaerechinus Echinus Rana ... 2-29 2-30 2-23 2-03 2-08 3-34 Such a comparison obviously suggested interesting conclusions in view of the fact that the two alecithic eggs behaved in the same way 30' 29 28 27 26 25 24 23 22 21 20 19 ]8 o 16 c14 11 10 9 7 - 6 - 5 - 4 3 2 1 h. 20 40 60 80 100 120 2 150 200 Minutes 4 Hours Fig. 77- while the yolk-laden one did not. Peter's final procedure was to set side by side a quotation from van'
. Chemical embryology. Embryology. 5o6 ON INCREASE IN SIZE [PT. Ill only held for the two echinoderms studied and not for the frog, thus: Cleavage stages Later stages Sphaerechinus Echinus Rana ... 2-29 2-30 2-23 2-03 2-08 3-34 Such a comparison obviously suggested interesting conclusions in view of the fact that the two alecithic eggs behaved in the same way 30' 29 28 27 26 25 24 23 22 21 20 19 ]8 o 16 c14 11 10 9 7 - 6 - 5 - 4 3 2 1 h. 20 40 60 80 100 120 2 150 200 Minutes 4 Hours Fig. 77- while the yolk-laden one did not. Peter's final procedure was to set side by side a quotation from van't Hoff, in which chemical reactions were said to be increased 2| times for each rise of tem- perature by 10°, and the overall average of his own work, 2-499. Nor did he fail to point out that in inorganic chemical reactions also the QjyQ increased as the temperature was lowered. Subsequent workers found many cases in which embryonic growth followed the exponential rule. Erdmann & R. Hertwig gave figures. 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
