Complex sentence: In 1794 he wrote a treatise on the principles of botany titled "Principes de botanique, expliqués au Lycée républicain par Ventenat", and after publication became disappointed with its mediocrity; he reportedly made efforts to procure all copies of the book and have them destroyed.
Split into simpler sentences: In 1794 he wrote a treatise on the principles of botany titled "Principes de botanique, expliqués au Lycée républicain par Ventenat". After publication he became so disappointed with its mediocrity that he reportedly made efforts to procure all copies of the book and have them destroyed.