THE SURVIVAL OF THE FITTEST 393 



spection is kept up and the most rigorous restraints 

 enforced on plant growers, our agriculture and 

 horticulture will totally fail. They forget or do 

 not know that nature constantly tends to produce 

 an equilibrium. Ever since life developed on this 

 planet a never-ending struggle has gone on be- 

 tween the good and bad influences and agencies to 

 build up and develop or weaken and destroy, — 

 the evil and ruinous forces of nature on the one 

 hand and her strength and upbuilding power, her 

 eternal fecundity and virility, on the other. Life 

 flourishes with as much health and vigor now as it 

 did in the old Cambrian days, and there is no rea- 

 son to believe that it will become extinct or even 

 grow feeble until the cooling off of the sun's heat 

 signals the end. 



