Complex sentence: He delivered a course of lectures before the Lowell Institute on "The Application of Science to the Arts" in 1862, and in 1861 was appointed inspector of gas and gas meters for the state of Massachusetts.
Split into simpler sentences: He delivered a course of lectures before the Lowell Institute on "The Application of Science to the Arts" in 1862. In 1861, he was appointed inspector of gas and gas meters for the state of Massachusetts.