. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. 120 George A. Sacher There are 63 species for which body weight, brain weight and Hfespan values were tabulated. Most orders of placental mammals are represented, the most important omissions being the bats and marine mammals. Common logarithms of the numbers were used in the statistical analysis. Simple and multiple linear regressions were computed. The statistical BRAIN WEIGHT - GRAMS 10 30 100 300 1000 3000. LOG,, 2 0 BRAIN WEIGHT Fig. 3. Relation of lifespan to brain weight for the same 63 s
. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. 120 George A. Sacher There are 63 species for which body weight, brain weight and Hfespan values were tabulated. Most orders of placental mammals are represented, the most important omissions being the bats and marine mammals. Common logarithms of the numbers were used in the statistical analysis. Simple and multiple linear regressions were computed. The statistical BRAIN WEIGHT - GRAMS 10 30 100 300 1000 3000. LOG,, 2 0 BRAIN WEIGHT Fig. 3. Relation of lifespan to brain weight for the same 63 species shown in Fig. 2. Symbols as defined in legend to Fig. 2. formulae are presented in lucid fashion by Hald (1952). Appendix 1 contains the means and standard errors of the variables, the regression coefficients and their standard errors, the total variances of the variables, and their residual vari- ances after removing the variance in regression. With the information provided the total, partial and multiple correla- tion coefficients can also be 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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