"The number of different optical phenomena has become in our time so great that caution must be taken so as to avoid b…"

"I can have little patience with those who oppose … the theory of evolution or what are called "mechanistic" explanati…"

"The phenomena of telepathy, and the transmission of intelligence from one sensitive to another through long distances…"

"But mainly I learned, in approaching the measurement of new phenomena, not just to consider using existing apparatus …"

"This kid may be the key not just to all human potential, but to all spiritual unexplained paranormal phenomena. The k…"

"Most students of nature sooner or later pass through a process of writing off a large percentage of their supposed ca…"

"It can scarcely be denied that the fundamental phenomena which first led mankind into chemical inquiries are those of…"

"Our alleged facts might be true in all kinds of ways without contradicting any truth already known. I will dwell now …"

"At any one time there is a natural tendency among physicists to believe that we already know the essential ingredient…"

"Unlike the position that exists in the physical sciences, in economics and other disciplines that deal with essential…"