. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. Relation of Lifespan to Brain and Body Weight 119 The theory of extremes can be used to compensate for the bias introduced by very great differences in cohort size. This has not been attempted in the present study. The data on brain weight and body weight were taken from the extensive compilations of these values by Count (1947), BODY WEIGHT-GRAMS 10301^3X10^ lo' 3XI0' 10* 3X10* lo' 3Xlo' 10* 3X10* - -. LOG|o BODY WEIGHT Fig, 2. Relation of lifespan to body weight for 63 species of mammals. Dat
. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. Relation of Lifespan to Brain and Body Weight 119 The theory of extremes can be used to compensate for the bias introduced by very great differences in cohort size. This has not been attempted in the present study. The data on brain weight and body weight were taken from the extensive compilations of these values by Count (1947), BODY WEIGHT-GRAMS 10301^3X10^ lo' 3XI0' 10* 3X10* lo' 3Xlo' 10* 3X10* - -. LOG|o BODY WEIGHT Fig, 2. Relation of lifespan to body weight for 63 species of mammals. Data plotted on double logarithmic grid. The symbols denote groups of species as follows: open circles— primates and lemurs; solid circles—rodents and insectivores; crosses—carnivores; solid triangles—ungulates and ele- phants ; star in circular field—man. von Bonin (1937), and Quiring (1950). The body weights and brain weights are in some instances averages of values re- ported by two or more investigators. Lifespans are the maxi- mum records encountered in the sources examined, and were obtained principally from the compilations by Bourliere (1946), Comfort (1956), Flower (1931), Walker (1954), and Yerkes and Yerkes (1929).. 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 Ciba Foundation; Wolstenholme, G. E. W. (Gordon Ethelbert Ward). Boston, Little, Brown
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