Coursework expansions were also underway. The department of civil engineering began to include instruction in sanitary and hydraulic engineering; however, students still did not yet have the opportunity to specialize in specific facet of desired profession outside of lab and thesis work.[38] In 1894, a new curriculum requirement was added: all freshmen, sophomore, and junior engineering students were required to take a two-week summer course to gain field experience via visits to coal mines, railroad shops, foundries, power stations, and similar businesses.