My girlfriend recently showed me a 1908 yearbook in which several women are marked as playing "Poos-ball" or "Poosball." An internet search for this reveals mostly misspellings of "Foosball," however, if the search is specific enough, the most common relevant results lead back to this same high school in Cincinnati. An example and, a photo of the "A grade Girls' Poos Ball team"! The question, of course, is what is Poos Ball? By the ball size, seems like soccer, volleyball, basketball, and water polo are the best bets. All four were invented prior to 1908, though the latter three sports would have been relatively new. However, there is no mention on the internet of any of these being formerly named Poosball! Thoughts?
Apparently, Poosball was an indoor game similar to basketball. It was also known as center ball and captain ball.
According to Volume 30 of Mind and Body (1923) it was invented by Dr. E. A. Poos in 1890 while at the Woodward High School in Cincinnati. Dr Poos wrote a booklet about the game, but I don't have access to its contents.
The game is also mentioned in: