484 PHILOSOPHICAL TEANSACTIONS. [aNNO iSgi-S. 



and buried 1 1 74 ; whence an increase of the people may be argued of 64 per 

 annum, or of about a 20th part, which may perhaps be balanced by the levies 

 for the emperor's service in his wars. But this being contingent, and the 

 births certain, I will suppose the people of Breslaw to be increased by 1238 

 births annually. Of these it appears, by the same tables, that 348 die yearly 

 in the first year, and that but 890 arrive at a full year's age ; and likewise, that 

 198 die in the five years between 1 and 6 complete, taken at a medium ; so 

 that only 692, of the persons born, survive 6 whole years. From this age, 

 the infants, being arrived at some degree of firmness, become less and less 

 mortal ; and it appears, that of the whole people of Breslaw, there die yearly, 

 as in the following table ; where the upper line shows the age, and the next 

 under it the number of persons of that age dying yearly. 



7 . 8.9. . 14 . 18 . 21 .27 . 28 . . 35 . 

 11. 11.6. 54 . 2 . 34 5 6 4^ 6-J- 9 . 8 . 7 -7 • 



45 49 54 . 55 . 56 . 63 

 7 . 7 . 10 11 . 9 . 9 . 10 . 12 



77 81 84 . 90 91 . 

 11 9i 6 .7 .3 .4 .2 . 1 . I . 1 . 



And where no figure is placed over, it is to be understood of those that die 

 between the ages of the preceding and subsequent column. 



From this table it is evident, that from the age of 9 to about 25, not above 

 6 per annum die of each age, which is much about one per cent. And whereas 

 in the 14, 15, 16, \7 years, much fewer appear to die, as 2 and 3i, yet that 

 seems rather to be owing to chance, as are also the other irregularities in the 

 series of age, which would rectify themselves, were the number of years much 

 more considerable, as 20 instead of 5. And by our own experience in Christ- 

 Church Hospital, I am informed there die of the young lads, much about one 

 per cent, per annum, they being of the foresaid ages. From 25 to 50 there 

 seem to die from 7 to 8 and 9 per annum of each age ; and after that to 70, 

 growing more infirm, though the number be much diminished, yet the mor- 

 tality increases, and there are found to die 10 or 11 of each age per annum : 

 from thence the number of the living becoming very small, they gradually de- 

 cline, till there be none left to die ; as may be seen at one view in the table. 



From these considerations I have formed the following table, the uses of 

 which are manifold, and which gives a juster idea of the state and condition 



