346 Practical Comparison of 



B. Annual mortality approaching to -^ = — A?, or Zl-f = , 



cc X cc 



A ^* T^ • ^* /-. T 1 As Equitable 



Age X, — Deparcieiix. — Carhsle. — Wu a/t 



10 (5.8) (2.9) 



20 (2.6) 2.2 



30 (1.8) 1.9 



40 1.2 1.7 1.3 



50 1.2 1.2 1.9 



^0 1.6 2.0* 2.7 



70 1.6* 1.8 3.3* 



80 1.4 1.4 8.0 



90 (.3) (.4) 1.8 



The precise value of c is here disregarded, but it may be observed 

 that it is nearly constant in each column towards the middle of life, 

 and that it must be perfectly so for some time about the maximum, 

 which is 60 or 70. The agreement is, however, less clearly seen in 

 this comparison than by means of the diagram ; the effect of the 

 discordances and irregularities of observation being here most 

 strongly marked, and disappearing as we pursue the computations 

 further. The Northampton table, treated in this manner, gives a 

 series of numbers always diminishing. 



12. The whole number of the living at each age, exhibited in any 

 tables, is computed from the annual decrements ; and this number 

 is next to be compared with the two hypotheses, omitting the years 

 of infancy. 



C. Number living, compared with .9 = 1 — 



