Until I was four years old I lived in the house of my paternal grandfather, about two miles from the pretty little village of Wallace, at the mouth of the river of that name.

The time was not yet ripe for the growth of mathematical science among us, and any development that might have taken place in that direction was rudely stopped by the civil war.

Quite likely the twentieth century is destined to see the natural forces which will enable us to fly from continent to continent with a speed far exceeding that of a bird.

My first undertaking in the way of scientific experiment was in the field of economics and psychology.

I was taught the alphabet by my aunts before I was four years old, and I was reading the Bible in class and beginning geography when I was six.

Aerial flight is one of that class of problems with which man will never be able to cope.

One of the most beautiful hypotheses ever propounded in physics is ... the Dynamical Theory of Gases