Now I know what the atom looks like.

The greatest contributor to the feeling of tension and fear of war arose from the power of the bombing aeroplane. If all nations would consent to abolish air bombardment . . . that would mean the greatest possible release from fear.

The year 1896 ... marked the beginning of what has been aptly termed the heroic age of Physical Science. Never before in the history of physics has there been witnessed such a period of intense activity when discoveries of fundamental importance have followed one another with such bewildering rapidity.

A good scientific theory should be explicable to a barmaid.

I must confess it was very unexpected and I am very startled at my metamorphosis into a chemist.

That which is not measurable is not science. That which is not physics is stamp collecting.

Don't let me catch anyone talking about the Universe in my department.