Complex sentence: In 1821 he became ordained as a minister, and during the following year, furthered his education in Paris, where he was accepted as a member of the "Société d'histoire naturelle".
Split into simpler sentences: In 1821 he became ordained as a minister, and during the following year, furthered his education in Paris. During his stay in Paris, he was accepted as a member of the "Société d'histoire naturelle".