"I have ever esteemed it a part of my duty to make the world acquainted with what I have done."

"I have observed that mercury, when heated, will rise in a tube against its natural tendency."

"I have seen a dog, whose hind legs were cut off, and yet it lived for a considerable time."

"The transmutation of metals is not impossible, but exceedingly difficult."

"I have always looked upon the study of nature as a source of innocent and rational pleasure."