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.

All attempts at artificial aviation are not only dangerous to human life, but foredoomed to failure from the engineering standpoint.

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

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

We are probably nearing the limit of all we can know about astronomy.

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.

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.