Longevity of English Thoroughbred Horses 39 



is 22 years. The proportions are very like those of prosperous 

 human survival curves; the time equivalence, obtained by 

 fitting the median and second quartile to the U.S. Census 

 curve for white males, 1941, beginning at the age of 10, is 



Table lb 



Life-table for 1,250 thoroughbred mares, foaled 



1860-64 



Ve = 044 



Ge = 0-214 



Median = 22-07 yrs. 



