No one has been a greater botanist or zoologist. No one has written more books, more correctly, more methodically, from personal experience. No one has more completely changed a whole science and started a new epoch.
A practical botanist will distinguish at the first glance the plant of the different quarters of the globe and yet will be at a loss to tell by what marks he detects them.
I demand of you, and of the whole world, that you show me a generic character by which to distinguish between Man and Ape. I myself most assuredly know of none.
