What a fascinating series of photographs. These were taken by Frances Benjamin Johnston around 1899 and we dug this up at the Library of Congress. It shows a group of young women exercising in the Western High School gymnasium.
Exploring History Through Photographs: Women Exercising at Western High School, 1899
Interesting pictures!
By the way, those are “Indian pins” or “Indian clubs.” Used frequently in exercises about 100 years ago.
http://artofmanliness.com/2012/03/18/an-introduction-to-indian-club-training/
This is so great because it shows one of the only interior shots of an Adolf Cluss designed building.