=To Close the Breech.=--Seize the bronze-handle with the right hand, thumb to the right, and swing the carrier-ring and block around until the carrier-ring is in its seat, grasping the lever-handle with the left hand, thumb down, at the same time, and raising the handle until it strikes the stop. The carrier-ring should be brought up to its seat sharply, but without slamming, and should be held firmly for an instant, otherwise the ring may start back slightly from the jar and the retracting-stud fail to hold the latch-pin high enough to allow the block to move forward. When the carrier-ring strikes its seat the retracting-stud enters the hole in the front face of the ring, and, acting on the recess in the latch, lifts the latch to its travelling position, that is, lifts it out of the locking-recess and holds it in such a position that when the block is pushed forward, the lower end of the latch will strike the inclined surface at the front of the longitudinal groove. Raise the lever-handle until it rests against the stop, and push the block forward until it stops. During this travel the lower end of the latch has moved up the inclined surface of the longitudinal groove and has locked the carrier-ring to the jacket. Revolve the block one sixth of a turn until it strikes the stop; lower the lever-handle to its proper position, when everything will be in the condition first described, the vent will be uncovered, and the gun will be ready for firing. When the block is revolved one sixth of a turn the lower end of the latch gradually drops into its groove, unlocking the carrier-ring, which remains so during firing. INSTRUCTIONS FOR DISMOUNTING. 1. Raise the lever-handle and turn the breech-block to the left. 2. Take out hinge-pin screws and remove the hinge-pin. 3. Withdraw the breech-block with carrier-ring. 4. Take out the latch-cover screws and remove the latch-cover, latch-spring, and latch. 5. Take out the stop-screw and remove the stop. 6. Take off the carrier-ring. =De Bange Obturator.= 7. Remove the spline-screw and take off the nut. 8. Take out the spindle. 9. Take out the spring. 10. Take off the obturator cups and pad. =Freyre Obturator.= 7. Remove the spline-screw and take off the nut. 8. Take out the spindle. 9. Take out the spring. 10. Take off the gas-check ring and face-plate. INSTRUCTIONS FOR ASSEMBLING. =De Bange Obturator.= 1. Put the obturator cups and pad in place on spindle. 2. Put in the spring. 3. Put in the spindle. 4. Screw on the nut, and put in the spline-screw. =Freyre Obturator.= 1. Put the gas-check ring and face-plate in place. 2. Put in the spring. 3. Put in the spindle. 4. Screw on the nut, and put in the spline-screw. 5. Put the carrier-ring on the breech-block. 6. Put in the stop and screw.