. Chemical embryology. Embryology. SECT. 2] AND WEIGHT 391 found that his series of chick embryo-weights could be accurately described by the equation: T3-6 1-496' or W=KT^-\ where K = o-668. This was not unlike the Balthazard-Dervieux formula for the human embryo: T= 19-4 X \^ 23 Diojs 5 10 U t2 13 14 Incub&lion 2052 Fig- 37- Murray plotted the log. wet weight against the incubation age, and obtained a curve concave to the abscissa (see Fig. 37) corresponding to the curve which McDowell, Allen & McDowell got for the mouse embryo (see Fig. 22). He also found that the relation of log
. Chemical embryology. Embryology. SECT. 2] AND WEIGHT 391 found that his series of chick embryo-weights could be accurately described by the equation: T3-6 1-496' or W=KT^-\ where K = o-668. This was not unlike the Balthazard-Dervieux formula for the human embryo: T= 19-4 X \^ 23 Diojs 5 10 U t2 13 14 Incub&lion 2052 Fig- 37- Murray plotted the log. wet weight against the incubation age, and obtained a curve concave to the abscissa (see Fig. 37) corresponding to the curve which McDowell, Allen & McDowell got for the mouse embryo (see Fig. 22). He also found that the relation of log. weight to log. age was a straight line as far as his series of weighings went, and showed that the weighings of Hasselbalch and of Lamson & Edmond fell on the same straight line (Fig. 38). Murray's formula gave very good agreement with his figures, but these did not extend further back than the fifth day of incubation. When, later, Needham. 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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