John Mayow Quote
We do not doubt to assert, that air does not serve for the motion of the lungs, but rather to communicate something to the blood...It is very likely that it is the fine nitrous particles, with which the air abounds, that are communicated to the blood through the lungs.
Tractatus duo. Quorum prior agit de respiratione: alter de rachitude (1668), 43. Quoted in Robert G. Frank jr., Harvey and the Oxford Physiologists (1980)