"I have always been of the opinion, that the best way to discover the secrets of nature, is to interrogate her by experiments."

"The properties of bodies depend upon the figure, size, and motion of their constituent particles."

"I once kept a viper in a sealed glass jar until it died, to observe the effects of air deprivation."

"Experiment, without reason, is blind; reason, without experiment, is lame."

"To be a good experimentalist, one must be a good observer."