===Phlogiston theory===Robert Hooke, Ole Borch, Mikhail Lomonosov, and all produced oxygen in experiments in the 17th and the 18th century but none of them recognized it as a chemical element.
Rezultate poskusov in svoje zaključke in ideje je objavil leta 1668 v svojem delu "Tractatus duo" (Drugi traktat) v poglavju "De respiratione" (Dihanje).