January – While working as a cook at New York's Sloan Hospital under an assumed name, Typhoid Mary infects 25 people, and is placed in quarantine for life.
September 11 – The Pennsylvania Railroad begins electrified commuter rail service between Paoli and Philadelphia, using overhead AC trolley wires for power. This type of system is later used in long-distance passenger trains between New York City, Washington, D.C., and Harrisburg, Pennsylvania.
^"Grim Tragedy in Woods". The New York Times, August 19, 1915. p. 1. Via Internet Archive.
^Louvish, Simon (2000). Monkey Business. New York: St. Martin's Press. pp. 10–11. ISBN 978-0-312-25292-2.
^"The long legacy of the U.S. occupation of Haiti". Washington Post. Retrieved 19 August 2022.
^Milton Friedman; Paul Anthony Samuelson (1980). Milton Friedman and Paul A. Samuelson Discuss the Economic Responsibility of Government. Center for Education and Research in Free Enterprise, Texas A&M University. p. 17.
^Heinz-Dietrich Fischer (1996). Novel / Fiction Awards, 1917-1994. Saur. p. 135. ISBN 978-3-598-30180-3.
^The Georgia Review. University of Georgia. 1995. p. 76.
External linksedit
Media related to 1915 in the United States at Wikimedia Commons