Clarence Edward Dutton was an American geologist and US Army officer. Dutton was born in Wallingford, Connecticut on May 15, 1841. He graduated from Yale College in 1860 and took postgraduate courses there until 1862, when he enlisted in the 21st Connecticut Volunteer Infantry; he fought at Fredericksburg, Suffolk, Nashville and Petersburg. He was elected as a member to the American Philosophical Society in 1871.

The Cosmos Club is a 501(c)(7) private social club in Washington, D.C., that was founded by John Wesley Powell in 1878 as a gentlemen's club for those interested in science. Among its stated goals is, "The advancement of its members in science, literature, and art and also their mutual improvement by social intercourse."