Science does not embody all that men know, only what is for men of science. The woodman tells me how he caught trout in a box trap, how he made his trough for maple sap of pine logs, and the spouts of sumach or white ash, which have a large pith. He can relate his facts to human life.
The knowledge of an unlearned man is living and luxuriant like a forest, but covered with mosses and lichens and for the most part inaccessible and going to waste; the knowledge of the man of science is like timber collected in yards for public works, which still supports a green sprout here and there, but even this is liable to dry rot.
