Slide Rear Roller, showing Manner of
Pinning the Roller in Action.
Slide-Carriage for the Long 21-cm. Gun,
Pattern 1873.
(Plan.)
(Section.)
Stirrup on Carriage for Endless Chain.
Rear of Slide, showing
Training-Gear, Chain-Roller,
Crank, and Recessed Rear
Roller for taking Recoil.