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… — Antonie van Leeuwenhoek Copy Share Image
If any person examines by the microscope that part towards the extremity of the spider's body from whence its thread proceeds, he will observe… — Antonie van Leeuwenhoek Copy Share
In rain water, I observed a small red worm and two other kinds of very minute insects; of those of the larger size, I… — Antonie van Leeuwenhoek Copy Share
I have often endeavoured to view the circulation of the blood in terrestrial animals, but without success, by reason that no parts of their… — Antonie van Leeuwenhoek Copy Share
In treating of the oak, I have considered that the species of it growing in warm climates is superior to that which is produced… — Antonie van Leeuwenhoek Copy Share
I observed certain animalcules, within whole bodies I saw so quick a motion as to exceed belief; they were about the size of a… — Antonie van Leeuwenhoek Copy Share
Whenever I found something remarkable, I have thought it my duty to put down my discovery on paper, so that all ingenious people be… — Antonie van Leeuwenhoek Copy Share
Man comes not from an egg but from an animalcule that is found in male sperm. — Antonie van Leeuwenhoek Copy Share
I've spent more time than many will believe [making microscopic observations], but I've done them with joy, and I've taken no notice those who… — Antonie van Leeuwenhoek Copy Share
I have divers times endeavoured to see and to know, what parts the Blood consists of; and at length I have observ'd, taking some… — Antonie van Leeuwenhoek Copy Share
Whenever I found out anything remarkable, I have thought it my duty to put down my discovery on paper, so that all ingenious people… — Antonie van Leeuwenhoek Copy Share
The 4th sort of creatures... which moved through the 3 former sorts, were incredibly small, and so small in my eye that I judged,… — Antonie van Leeuwenhoek Copy Share
How inscrutable and incomprehensible are the hidden works of Nature! — Antonie van Leeuwenhoek Copy Share
I have oft-times been besought, by divers gentlemen, to set down on paper what I have beheld through my newly invented microscopia, but I… — Antonie van Leeuwenhoek Copy Share
If we now plainly perceive that the passage of the blood from the arteries into the veins of the tadpole is not performed in… — Antonie van Leeuwenhoek Copy Share
