ジョセフ・ルイ・ゲイ＝リュサック
In the fall of 1814, he went on another educational trip to Paris to study at the Sorbonne, he remained there until the spring of 1815. Together with his cousin, Christian Gottlob Gmelin he made the acquaintance of René Just Haüy, Joseph Louis Gay-Lussac, Louis Jacques Thénard and Louis Nicolas Vauquelin.