PROCESS OF STEEL CHANGE ON GYRONATORY. WAS PLACING BOLTS INTO MAINFRAME WHEN ONE BECAME STUCK. RELEASED HOLD ON BOLT TO LOOK UNDERNEATH. AT THAT MOMENT THE BOLT FREED AND SLID INTO PLACE CATCH ING THE TIP OF HIS LEFT MIDDLE FINGER BETWEEN THE BOLT AND THE MAINFRAME. HE SUSTAINED A FRACTURE TO THE TIP OF THE LEFT MIDDLE FINGER.