Charles Howard “Bull” Hinton was a mathematics instructor at Princeton from 1893 to 1897.  His theories on non-Euclidean geometry and a fourth dimension of space drew him some acclaim, but at the College he was most famous among the students for his invention of the first baseball-pitching machine, called a “baseball gun,” which could throw a ball at a range of speeds and angles.  The Princeton baseball team practiced with the device for a time, but then abandoned it because the cannon-like muzzle and gunpowder charge frightened the batter.  Hinton later worked as an examiner for the U.S. Patent Office.

• To learn more about baseball at Princeton, see icon #9, and Café Vivian picture #18 and 48.
  
  
• To learn more about athletics at Princeton, see quotation #4, 9, 21, and 22, and Café Vivian picture #6, 7, 9, 18, 39, 48, 49, 54, 56, 61, 69, 72, 97, 102, 111, 123, and 126.
  
  
•  To learn more about notable Princeton professors, see icon #7, quotation #6, 13, 15, 20, 21, 26, 27, 31, 32, 34, 39, and 40, and Café Vivian picture #10, 14, 17, 25, 29, 43, 51, 57, 59, 60, 68, 75, 87, 94, 101, and 108.
  
  
• To learn more about the history of science at Princeton, see icon #2, 5, 6, and 7, quotation #9, 27, 34, and 39, and Café Vivian picture #14, 15, 25, 32, 35, 41, 43, 51, 64, 75, 78, 83, 87, 90, 114, and 131.

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