Through the 17th century, a study of combustion was created by Jan Baptist van Helmont who found that burning charcoal introduced a fuel sylvestris, or wild spirit.[32] This was subsequently incorporated into Phlogiston theory by Johann Joachim Becher in 1667; a concept that will dominate alchemical pondering for approximately two https://car-park-extract-systems78899.blogtov.com/17144330/a-secret-weapon-for-fire-rated-ductworth-insulation