I made observations for three hours last night, and am almost ill today from fatigue; still I have worked all day, trying to reduce the places, and mean to work hard again tonight.

I am always the better for open-air breathing, and was certainly meant for the wandering life of the Indian.

I was born, for instance, incapable of appreciating music.

I was a little doubtful about the propriety of going to the Mammoth Cave without a gentleman escort, but if two ladies travel alone they must have the courage of men.

Every formula which expresses a law of nature is a hymn of praise to God.

The greatest benefit derived from the study of science is that it lifts you out of and above the littleness of daily trials. We learn to live in the universe as a part of it; we cannot seperate ourselves from it - our every act connects us with it - our every act affects the whole. Standing under the canopy of stars and remembering their presence you could scarcely do a petty deed, or think a wicked thought.

We travel to learn; and I have never been in any country where they did not do something better than we do it, think some thoughts better than we think, catch some inspiration from heights above our own.