Complex sentence: Paris School of Mines In 1834 he was appointed head of the permanent committee of mining statistics, and in 1840 engineer-in-chief and professor of metallurgy at the École des Mines, where he became inspector in 1848.
Split into simpler sentences: Paris School of Mines In 1834, he was appointed chairman of the permanent committee of mining statistics. In 1840, he became engineer-in-chief and professor of metallurgy at the École des Mines, where he became inspector in 1848.