600 
BIONOMIC NOTES 
mere preservation of his specimens and records day by day is the 
work of many hours. Again, he is constantly brought into contact 
with problems that the most active brain may find it hard to grasp, 
let alone to solve. 
The study of Nature in the field, no less than in the laboratory, 
is far from tending to simplify our explanations of the facts that 
meet our eyes. Each discovery does but open to our view new 
domains of the unknown. Theories that in our youth charmed us 
by their simplicity and completeness, prove in our old age to be 
hopelessly inadequate, so that if we are honest, we must admit the 
truth of the paradox, that every addition to our knowledge does but 
increase the vastness of our ignorance. 
