Diamond
Antoine Lavoisier burned diamond and observed it in a closed vessel, proving that it was a form of Carbon. He indicated that when it grew hot enough, it simply disappeared, contributing to disprove the phlogiston theory.
Antoine Lavoisier burned diamond and observed it in a closed vessel, proving that it was a form of Carbon. He indicated that when it grew hot enough, it simply disappeared, contributing to disprove the phlogiston theory.