Final answer:
The exact number of articles Susan Glaspell wrote about the John Hossack murder case is not specified in the provided materials. Her experience informed her later works, including the play 'Trifles' and the story 'A Jury of Her Peers.'
Step-by-step explanation:
Susan Glaspell was a reporter who covered the John Hossack murder case. However, the materials provided do not specify the exact number of articles she wrote on the case. Glaspell later used her experiences as a reporter covering the Hossack murder as inspiration for her play, Trifles, and the short story A Jury of Her Peers. Her reporting and later works reflected a deep understanding of the societal attitudes towards women during her time, and she is recognized for her contributions to feminist literature.