To dismount the breech loading parts: 1. Remove the hinge pin by pressing on its point with a small-sized punch until the end carrying the arm projects sufficiently to enable it to be grasped and removed by the fingers. 2. Remove the breech block carefully, so as not to allow the extractor and ejector spring to fall out. 3. Remove the extractor and ejector spring. 4. Remove the cam latch by unscrewing the breech block cap screw, and loosen the cap with the point of a screw-driver. 5. Remove the cam latch spring. 6. Turn out the firing pin screw, then take out the firing pin and spring from the breech block. To assemble: 1. Insert the firing pin screw in the breech block, then the firing pin, and then replace the firing pin screw. 2. Insert the cam latch spring in its place. 3. Replace the cam latch and the breech block cap; turn the cap screw well down. 4. Insert the ejector spring in its place. 5. Replace the extractor in such a position in the breech block that the small recess in the back of the extractor will be in a position to be presented to the point of the ejector spring spindle. 6. Insert the breech block. After seeing that the point of the spindle has entered the recess in the back of the extractor, strike the breech block over the thumb piece and head of the firing pin, a smart blow with the palm of the hand, forwards and downwards, this will cause it to enter sufficiently to hold it in place. Then press it into position by grasping the block and receiver with the fingers and thumb, the thumb uppermost, and squeeze it home. 7. Insert the hinge pin by striking it a sharp blow with the palm of the hand. See that the stud in the arm enters the recess cut for it on the side of the receiver. Should the thumb piece interfere with the head of the hammer in raising the breech block, it is probable that either the tumbler or sear screw is too loose or broken. _Whitney Breech Loading Gun (made by Whitney Arms Company, New Haven, Conn.)_—To take apart: 1. Give the screw in the side of the frame or receiver (that holds the two fulcrum pins) a few turns to release the flanges or heads of the two pins, then turn them away from the screw a little. 2. Place the hammer on the half-cock, open the breech half way, and press the locking shoulder back with the screw-driver until it is held by the catch on the locking lever made for the purpose. 3. Knock out the pin that holds the breech block, and take out the breech block, lever and cartridge extractor at the same time. 4. Bring the hammer to full-cock, so as to release the locking shoulder, and then uncock it, pressing it forward so as to relieve the tension of the springs; knock out the large pin, and take out the hammer and locking shoulder together.