"The human mind is always eager for novelty and impatient of repetition."

"It is almost possible to predict one or two days in advance, within a rather broad range of probability, what the weather is going to be; it is even thought that it will not be impossible to publish d…"

"We may lay it down as an incontestible axiom, that, in all the operations of art and nature, nothing is created; an equal quantity of matter exists both before and after the experiment; the quality an…"

"It is not often that a man has the opportunity to be useful to his fellow citizens without any personal risk."

"The more exact the science, the more difficult it is to make progress."