500 Further Evidence of Natural Selection in Man 
Table VII shows how rapidly the system approximates to the theoretical values 
in the case of the higher differences. 
On the basis of all the tests we have applied we may, we think, conclude that 
by tlie sixth difference we have reached values for the correlation of deathrates 
in successive years which are in all probability close to the organic or intrinsic 
values. Only in the first and second years of life is steadiness not absolutely 
reached, but for practical purposes but little change can be anticipated in the 
correlation coefficients. 
TABLE VII. 
Ratio of Squared Standard Deviations. 
s 
Ml 
«i2 
»H4 
Mean 
Mean 
Theory 
6 
? 
6 
? 
6 
? 
s 
? 
i 
? 
? 
1 
•949 
•956 
•354 
-369 
■142 
•144 
•194 
•192 
•211 
•181 
•370 
•368 
2 
o 
3-199 
3 
-221 
3^374 
3-384 
2-731 
2-934 
2^127 
2^317 
1-996 
2-685 
2-717 
3 
3 
3-547 
3 
-552 
3-638 
3-633 
3-133 
3-240 
2-944 
3^086 
2-896 
3^109 
3-232 
3-324 
3-333 
4 
3-670 
3 
673 
3-754 
3-741 
3-363 
3-428 
3-341 
3^504 
3-054 
3-227 
3^438 
3-515 
3-500 
5 
3-738 
3 
723 
3-811 
3-793 
3-591 
3-604 
3-509 
3-562 
3-504 
3-641 
3-631 
3-665 
3-600 
6 
3-756 
3 
734 
3-848 
3-828 
3-690 
3-683 
3-708 
3-648 
3-691 
3-758 
3-739 
3-730 
3-667 
(5) We can look at the association of deathrates in successive years from 
another standpoint. We can ask if there be an increase of 10 points in the 
deathrate for a given year, what increase or decrease will there be of deathrate 
in the same group in the following year ? 
In Table VIII below the second column gives the spurious change which is 
apparent in the crude data, the third column gives the real organic change which 
is discovered when the time-factor is removed. 
TABLE VIIL 
Association of Deathrates without and ivith Annulment of Timef actor. 
Result of an increase of 10 deaths per mille in one year of life on the deaths per 
mille in the next year. 
Increase of 10 in Deathrate of 
Disregarding Time-factor 
Annulling Time-factor 
s 
? 
6 
? 
1st Fear on 2nd Year 
2nd Year on 3rd Year 
3rd Year on 4th Year 
4th Year on 5th Year 
Increase 3-3 
Increase 6-1 
Increase 6 9 
Increase 7-0 
Increase 3-8 
Increase 6'6 
Increase 6-7 
Increase 6-8 
Decrease 3-7 
Decrease 2-2 
Decrease 5-2 
Decrease 5-1 
Decrease 4-3 
Decrease 2-5 
Decrease 5-3 
Decrease 4-5 
