Anyone who is practically acquainted with scientific work is aware
that those who refuse to go beyond fact, rarely get as far as fact; and
anyone who has studied the history of science knows that almost every
great step therein has been made by the "anticipation of Nature."
X
There are three great products of our time.... One of these is that
doctrine concerning the constitution of matter which, for want of a
better name, I will call "molecular"; the second is the doctrine of the
conservation of energy; the third is the doctrine of evolution.