. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. Ageing in Inbred Strains of Animals 119 starting point for comparison. Mammary cancer subsequently occurred in 74 per cent of the remaining 66 animals. Only 12 sisters ( 18 per cent) also developed a neoplasm within a month. The other animals showed a neoplasm within a period which in extreme cases amounted to over a year. The Lifespan The following example shows the survival curves of two strains of our mouse colony and their hybrids. Fig. 1 demon- strates the difference in lifespan of the two stra
. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. Ageing in Inbred Strains of Animals 119 starting point for comparison. Mammary cancer subsequently occurred in 74 per cent of the remaining 66 animals. Only 12 sisters ( 18 per cent) also developed a neoplasm within a month. The other animals showed a neoplasm within a period which in extreme cases amounted to over a year. The Lifespan The following example shows the survival curves of two strains of our mouse colony and their hybrids. Fig. 1 demon- strates the difference in lifespan of the two strains and the. 15 AGE IN MONTHS 20 25 30 NUMBER OF NORMAL 5-i VAGINAL CYCLES A- â per month 3- â¢. 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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