An employee went into the cotton compress pit and climbed a ladder up to two press boxes. The press boxes are 24 in. wide x 48 in. long and held together by a bar between them. The press box rotates before it compresses the cotton. There is an 8 inch opening and the employee's arm got caught in that opening. As the press box began to rotate it tore part of his arm. The employee was able to pull his arm out and was transported and admitted to the hospital. His arm was amputated at hospital.