Complex sentence: Francis Farquhar was an active Sierra Club leader and served as its president 1933-1935 and 1948-1949, "Sierra Club Bulletin" editor from 1926 to 1946, and in other club offices as director from 1924 to 1951.
Split into simpler sentences: Francis Farquhar was an active Sierra Club leader and served as its president 1933-1935 and 1948-1949. He served as "Sierra Club Bulletin" editor from 1926 to 1946, and in other club offices as a director from 1924 to 1951.