In 1904 the Institute was for the fourth time devastated by fire, when its main building was completely destroyed. However, RPI underwent a period of academic and resource expansion under the leadership of President Palmer Ricketts. Named President in 1901, Ricketts liberalized the curriculum by adding the Department of Arts, Science, and Business Administration, in addition to the Graduate School. He also expanded the university's resources and developed RPI into a true polytechnic institute by increasing the number of degrees offered from two to twelve; these included electrical engineering, mechanical engineering, biology, chemistry, and physics. During Rickett's tenure, enrollment increased from approximately 200 in 1900 to a high of 1,700 in 1930.