Mr. Morgan on Survivorships. 233 
In the solution of all the problems which involve the con- 
tingency in the foregoing table, the constant method of ascer- 
taining it has hitherto been, by taking half the probability of 
the two lives becoming extinct in a given time, both in the 
case of the elder life's dying after the younger, and of the 
younger s dying after the elder. When the ages of the two 
lives are very different, this method (as I have observed in my 
former paper) must be incorrect. I have taken considerable 
pains to determine the extent of the inaccuracy, and for this 
purpose have computed the following table. 
mdccxciv. 
Hh 
