_A continuous-pull firing mechanism_ is carried in the recess bored out in the center of the block and is operated by the trigger shaft which projects from the bottom of the block. This mechanism is cocked and fired by one continuous motion of the trigger shaft so that in case of a misfire the primer may be struck a second blow by releasing the shaft and rotating it again. A lanyard may be attached to the projecting end of the trigger shaft. CARRIAGE. =Weights and Dimensions.= Weight of carriage, complete, fully equipped, without the gun 2280 pounds Weight of gun and carriage fully equipped 3045 pounds Weight of lunette, carriage limbered 140 pounds Diameter of wheels 56 inches Width of track, center to center of wheels 60 inches Length of recoil of gun on carriage, variable recoil 18 to 46 Height of axis of gun about ground 42 approx. Amount of elevation with elevating handwheel 42 degrees Total limits of elevation 7 to plus 53 degrees Maximum traverse either side of center 400 mils Over all width of trails, spread 130 inches Over all length, muzzle of gun to end of lunette 173 inches Limits of elevation with angle of site handwheel, minus 7 degrees depression to 11 degrees elevation. Description. _The carriage_ is of the split trail, variable long-recoil type. The length of recoil is regulated automatically, so that the breech of the gun will not strike the ground on recoil at an angle of elevation of less than 47 degrees. At elevations greater than 47° a hole must be dug for the breech in recoil. The gun is mounted in slides on a _cradle_ formed by the spring cylinder. The spring cylinder is suspended by trunnions mounted in bearings in the top carriage, which is supported by the pintle bearing to which are attached axle arms bearing in the wheels. The carriage has an _independent angle of site_ elevating mechanism, by means of which a maximum depression of seven degrees and an angle of elevation of 11 degrees may be obtained. The remaining elevation is obtained through the elevating handwheel. =The principal parts of the carriage are:= Trail Cradle Recoil mechanism Top carriage Pintle bearing Equalizing gear Shields Angle of site mechanism Elevating mechanism Traversing mechanism Axle seat Brake mechanism Shoulder guards Firing mechanism Sight, model of 1916 Wheels. [Illustration: 75 MM. GUN CARRIAGE MODEL OF 1916. LEFT ELEVATION.] [Illustration: 75 MM GUN CARRIAGE. MODEL OF 1916. RIGHT ELEVATION.]