116 



ALASKA. 



From this table behold that — 



a. Every flfteeu years, from 3,600 females, there can be received 

 in sixteen years 24,700 seals j in sixteen years still more; and 

 in twenty years 41,040. _-JV 



h. In the twenty-first year the iuwrnOT^ begin to diminish, 

 provided that if in the mean time, or the following sixteen years, 

 a certain number of young seals are not left to breed; and 

 if every year a known number are 'e*c to breed, then in all 

 following years the yield will nevei be less than 20,000 every 

 year. 



Table III. — Calculation as to tlie coviing of the seals on tlie island of Saint 

 George, made up from two years, and based upon that experience, (1827-'28.) 



The actual taking of seals was as follows : 



Inl828 4,778 



In 1829 3,661 



In 1830 2, 834 



In 1831 3, 084 



In 1832 3, 296 



In 1833 3, 212 



Inl834 . 3,051 



In 1835 2, 528 



Inl836 : 2,550 



In 1837 2,582 



Total 31, 476 



From this table it will be seen that up to 1838 my cal- Seals. 



culation makes a yield of ... , 30, 870 



While the actual result was 31, 476 



Difference of. 



606 



The difference determines that the hypothesis upon which 

 the table is based is correct. 



