This observation should not only lead a mother to be alive to the possibility of the Successional occurrence of these diseases in her family, and so early note their appearance, and seek medical advice, but should at the same time make her most anxious, on the one hand, to shield her child from all their exciting causes, and on the other, to adopt those measures which may contribute indirectly to overcome the constitutional predisposition to them.
"The Maternal Management of Children, in Health and Disease."
Thomas Bull, M.D.
Successional trends were greatly altered.
"Ecological Observations on the Woodrat, Neotoma floridana"
Henry S. Fitch Dennis G. Rainey