I love fools' experiments. I am always making them.

Physiological experiment on animals is justifiable for real investigation, but not for mere damnable and detestable curiosity.

In the struggle for survival, the fittest win out at the expense of their rivals because they succeed in adapting themselves best to their environment.

My wife has just finished reading aloud your 'Life with a Black Regiment,' and you must allow me to thank you heartily for the very great pleasure which it has…

Finally, as the digestive canal is a complex system, a series of separate chemical laboratories, I cut the connections between them in order to investigate the…

Every experiment destroys some of the knowledge of the system which was obtained by previous experiments.

After remaking the animal's organism in accordance with our design, which naturally caused more or less damage to the experimental animal, we had to find a mod…