In the year 1657 I discovered very small living creatures in rain water.

Man has always to be busy with his thoughts if anything is to be accomplished.

Examining this water...I found floating therein divers earthy particles, and some green streaks, spirally wound serpent-wise...and I judge that some of these little creatures were above a thousand times smaller than the smallest ones I have ever yet seen, upon the rind of cheese, in wheaten flour, mould, and the like.