The Journal of General Physiology
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The Journal of General Physiology, Vol 9, 39-48, Copyright © 1925 by The Rockefeller University Press

ARTICLE

PHYSIOLOGICAL ONTOGENY

A. CHICKEN EMBRYOS. III. WEIGHT AND GROWTH RATE AS FUNCTIONS OF AGE.



Henry A. Murray Jr. 1

1 From the Hospital of The Rockefeller Institute for Medical Research.

1. The average weights of chicken embryos between 5 and 19 days of incubation as found by over 600 weighings may be expressed by a simple exponential equation,

W = K t3.6

where K = 0.668.

2. The velocity of growth (i.e. the percentage increase in mass) is inversely proportional to the incubation age. The product of the two (vt) is a constant (3.6). The negative acceleration of growth likewise decreases with age.

Accepted on March 10, 1925


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I. M. Lerner
THE SHAPE OF THE CHICK EMBRYO GROWTH CURVE
Science, January 6, 1939; 89(2297): 16 - 17.
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