‘To experience we refer, as the only ground of all physical inquiry. But before 
experience itself can be used with advantage, there is one preliminary step to make, 
which depends wholly on ourselves: it is the absolute dismissal and clearing of the 
mind of all prejudice from whatever source arising, and the determination to stand 
or fall by the result of a direct appeal to facts in the first instance, and of strict 
logical deduction from them afterwards.” 
Sir Joun HerscuE.: Discourse on the Study of Natural Philosophy. 
“The fair question is, Does the newly proposed view remove more difficulties, 
require fewer assumptions, and present more consistency with observed facts than 
that which it seeks to supersede? if so the philosopher will adopt it, and the world 
will follow the philosopher—after many days.” 
Mr. Justice Grove: Jxaugural Address as President of the British 
Association, 1866. 
