"Here, then: a revolution [in science and chemistry] has taken place in an important part of human knowledge since you…"

"When I began the following Work, my only object was to extend and explain more fully the Memoir which I read at the p…"

"Thus, while I thought myself employed only in forming a Nomenclature, and while I proposed to myself nothing more tha…"

"It is a maxim universally admitted in geometry, and indeed in every branch of knowledge, that, in the progress of inv…"

"We must trust to nothing but facts: These are presented to us by Nature, and cannot deceive. We ought, in every insta…"

"We may lay it down as an incontestible axiom, that, in all the operations of art and nature, nothing is created; an e…"

"Now Mayow, like Boyle, conceived the air as made up of minute particles, while he restricted himself to two varieties…"

"Though Lavoisier generally gets credit for the authorship of this principle [ conservation of mass ], others had conc…"

"One of the most fundamental principles of Lavoisier's chemistry was the use of numbers, notably in relation to what w…"

"In 1774 he [ Joseph Priestley ] thought he had obtained nitrous oxide... in 1775 he saw the gas as dephlogisticated a…"