. Chemical embryology. Embryology. SECT. 2] AND WEIGHT 421 under a given set of favourable conditions (much more constant, of course, in egg or uterus than outside), a mature weight which is characteristic of its own species, just as the product of a chemical reaction in vitro reaches under a given set of conditions a definite equilibrium concentration characteristic of its kind. The mature weight A was determined by Brody for a large range of animals. Fig. 49- by a graphical method. Now, in this process of geometrical pro- gression in which the increments in unit time are becoming pro- gressi
. Chemical embryology. Embryology. SECT. 2] AND WEIGHT 421 under a given set of favourable conditions (much more constant, of course, in egg or uterus than outside), a mature weight which is characteristic of its own species, just as the product of a chemical reaction in vitro reaches under a given set of conditions a definite equilibrium concentration characteristic of its kind. The mature weight A was determined by Brody for a large range of animals. Fig. 49- by a graphical method. Now, in this process of geometrical pro- gression in which the increments in unit time are becoming pro- gressively smaller, it is found that in each unit of time the gain made in percentage of the gain made in the previous unit of time is a constant. Thus, in the autostatic growth-phase of the rabbit, for example, the gain is, during each month, 78 per cent, of what it was during the previous month. Brody calculated out this constant, k (simple growth persistency), for a great many animals. It corre- sponds to the specific velocity constant in chemical 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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