Alexander, Hattie Elizabeth (05 April 1901–24 June 1968), microbiologist and pediatrician, was born in Baltimore, Maryland, the daughter of William Bain Alexander, a merchant, and Elsie May Townsend, both of Scottish ancestry. The family remained in Baltimore throughout Alexander’s relatively happy and comfortable childhood. She attended Baltimore’s Western High School for Girls prior to enrolling in Goucher College, to which she won a partial scholarship. While at Goucher, her enthusiasm for a variety of sports—hockey, baseball, basketball—exceeded that for academics, and she was an unimpressive student. Nevertheless, she exhibited marked, though largely unapplied, skill in Dr. Jessie King’s bacteriology class, and fellow students in the Goucher yearbook declared that “ambition fires her; hygiene claims her; kindness portrays her.”...