James Read Chadwick

James Read Chadwick
Born	(1844-11-02)November 2, 1844 Boston, Massachusetts, U.S.
Died	September 23, 1905(1905-09-23) (aged 60) Chocorua, New Hampshire, U.S.
Alma mater	Harvard University Harvard Medical School
Spouse	Katherine Maria Lyman ​ ​ (m. 1871; died 1889)​
Relatives	Elizabeth Chadwick Whittier (sister)

James Read Chadwick (November 2, 1844 – September 23, 1905) was an American gynecologist and medical librarian remembered for describing the Chadwick sign of early pregnancy in 1887.