Aerial flight is one of that class of problems with which man will never be able to cope. . . . The example of the bird does not prove that man can fly. Imagine the proud possessor of the aeroplane darting through the air at a speed of several hundred feet per second. It is the speed alone that sustains him. How is he ever going to stop?

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

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

The beginning of 1856 found me teaching in the family of a planter named Bryan, residing in Prince George County, Md., some fifteen or twenty miles from Washington.

Though born in Nova Scotia, I am of almost pure New England descent.

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

My father was the most rational and the most dispassionate of men.