"I could not find in all the shops in London a glass bubble strong enough to resist the pressure of the air when exhausted."

"I have often wished that I had lived in an age when philosophy was more free and less tied to the authority of the ancients."

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

"I have always looked upon the study of nature as a means of glorifying God, and of promoting the welfare of mankind."

"I have always been of the opinion, that the best way to promote knowledge, is to communicate our discoveries to others."