And it was a student trained in the same schools, Francesco Redia man of the widest knowledge and most versatile abilities, distinguished alike as scholar, poet, physician, and naturalistwho, just two hundred and two years ago, published his "Esperienze intorno alla

Then he brings forth a familyof tiny worms quite unlike himself, little creatures called rediae, which soon give birth to families of young rediae.

Then he brings forth a familyof tiny worms quite unlike himself, little creatures called rediae, which soon give birth to families of young rediae.

So they may go on for several generations, but at last there comes a generation of rediae which, instead of giving birth to fresh rediae, produce families of totally different offspring; big-headed, long-tailed creatures like miniature tadpoles, called by the learned cercariae.

So they may go on for several generations, but at last there comes a generation of rediae which, instead of giving birth to fresh rediae, produce families of totally different offspring; big-headed, long-tailed creatures like miniature tadpoles, called by the learned cercariae.