"Fire, that is so wonderful, cannot be generated without Air."

"I presume in this Treatise.. to alledge proofs, that a kind of Air subsisting in our atmosphere is a true constituent…"

"He [ Joseph Priestley ] still adhered to the old opinion that all pure alkalies and absorbent earths must effervesce …"

"I take it as a certainty for granted, that pure water in itself can neither by art nor nature be changed into a dry s…"

"The object and chief business of Chemistry consists in a skilful decomposition of bodies into their integrant parts, …"

"Hitherto chemists are not agreed upon the number of simple principles or elements, of which all corporeal substances …"

"I found the great necessity to know the Fire, since it is impossible to make experiments without heat and fire, or to…"

"After a series of experiments, I observed, that Air really makes part of the compound of Fire, and is a constituent p…"

"Air is... mixed with another elastic fluid similar to air, and which is in many respects differing from it, called ve…"

"Researches on Air... may furnish sufficient materials for new discoveries to every one who chuses to set about making…"