Note 54 — Chapter VI
Reading edition
"Let p be the chance of death from a random, not a constitutional source, then 1-p is the chance of a selective death in a parent and 1-p again of a selective death in the case of an offspring, then
(1-p)2 must equal about ⅓, = .36, more exactly ∴ 1-p = .6 and p = .40. In other words, 60% of the deaths are selective."