38 



A. Comfort 



are derived, are given in Fig. 1 and Table la and b. The 

 curves for the samples coincide closely; they are of typical 

 Gompertzian form, with a high early survival and a steadily 

 increasing force of mortality. 



The modal age of adult death 



Table la 



Life-table for 1,492 thoroughbred mares, foaled 



1875-80 



Ve = 0-046 

 (Je = 0-214 

 Standard deviation = 5-5 yrs. 



