I observed certain animalcules, within whole bodies I saw so quick a motion as to exceed belief; they were about the size… — Antonie van Leeuwenhoek Copy Share Image
I have divers times examined the same matter (human semen) from a healthy man... not from a sick man... nor spoiled by… — Antonie van Leeuwenhoek Copy Share Image
The 31th of May, I perceived in the same water more of those Animals, as also some that were somewhat bigger. And… — 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
![“The 31th of May, I perceived in the same water more of those Animals, as also some that were somewhat bigger. And I imagine, that [ten hundred thousand] of these little Creatures do not equal an ordinary grain of Sand in bigness: And comparing them with a Cheese-mite (which may be seen to move…” quote by Antonie van Leeuwenhoek](https://sms4smile.com/quotes/i/a1e/antonie-van-leeuwenhoek-17943_animal_the-31th-of-may-i-perceived-in-the-same_2552391.png)