IV. 
Tables of the present Value of a Life-Annuity at any Age, accord- 
ing to Dr. Wigglesworth’s Bill of Mortality. 
BY J. INGERSOLL BOWDITCH. 
Tue Table, exhibiting the Law of Mortality in the northern 
part of the United States, given by Dr. Wigglesworth, in 
the second volume of the Memoirs of the American Acad- 
emy, being generally used in Massachusetts, to ascertain the 
value of a Dower-right, it was thought advisable to construct 
the following Tables to facilitate such calculations. 
Taste I. Exhibits the Expectation of Life, expressed in years 
and decimals of a year, in the United States, and in the City of 
Carlisle (England), at intervals of five years. These agree near- 
ly with each other in the middle ages, but there is a considerable 
difference in ages below 20 years; the Carlisle bill of mortality 
giving a much greater expectation than most tables, which have 
been published. 
Tas_e IJ. Exhibits the Expectation of Life in the United 
States at every age, according to Dr. Wigglesworth’s Table. 
Thus at the age of 50 years, the expectation of life is 21+% years. 
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