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���At the end of a lane formed by rope fences is a wall on which the figures of catchers are painted, as well as enthusiastic occupants of grandstand seats. Two home plates are provided — one for a dummy left-handed batter and the other for a dummy right-handed batter. Immediately behind each home plate is a pad, corresponding with the "strike" area. When the pitcher makes a "strike," the pad moves back, completes an electric circuit, and rings a bell. A spring returns the pad to position, whereupon the bell ceases its ringing and the apparatus is ready for the next pitched ball
���A sheet of canvas, stretched on a frame, has an opening the exact shape of the "strike" area to be considered by the pitcher. Back of the opening is a pocket communicating with a trough behind the sheet, leading to the "strike" runway shown. A second trough extends across the front of the sheet and communicates with the "ball" runway shown. Pitch a ball so that it passes into the opening in the canvas and you make a "strike," the ball being returned in its special runway after recording the "strike" on a register in the runway. Pitch a "ball," which means that you fail to land in the opening, and the ball will also be returned by way of the "ball" runway, your inaccuracy being subsequently registered by another recorder
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