=Chief of Section.=—Must teach his men to have pride in the gun they serve, and the reputation of the section. He shows each member how the accuracy of firing is dependent on him, and that one man may ruin the best efforts of all the others. He must keep his materiel as clean as when it left the makers hand, every part functioning properly, every screw and nut tightened, no burred nuts or bolts, or missing split pins. He helps each member to take a pride in keeping the part for which he is responsible as clean as a new pin and in perfect condition. He sees that the various canvas covers and sponge and rammer never touch the ground where they will gather dirt. He knows the proper use of his tools, and the correct adjustment of the firing mechanism. He must be able to assemble and disassemble blindfolded the firing lock and breech mechanism. In firing he knows the settings of all scales without reference to a data book. =The Gunner.=—Knows that turning the levelling screw clockwise moves cross bubble to the right; that turning scroll gear clockwise increases the range; that turning the peep sight screw clockwise increases deflection, and so on with all handwheels, etc., that he operates and must know these things so well that he operates them in the proper direction automatically. Must always bring vertical wire on aiming point from the left to take up any play in traversing mechanism. He verifies that he is on the aiming point after the breech is closed and if there is any delay, again immediately before firing. He gets his eye back to the sight and relays _immediately_ the gun returns to battery. He knows his scale readings at all times. He keeps his sight scrupulously clean, never permits his finger to touch the objective prism when turning the rotating head, nor wipes off eye piece with hand. He keeps his shoulder against the guard at all times. =The Number 1.=—He knows his site and range scale readings without having to look at them. In centering the bubble he brings it always from front to rear to take up play in the elevating mechanism. He centers the bubble so accurately that it is not the thickness of a sheet of tissue paper nearer one graduation than the other, and what is most important he sees that it stays there until he fires the pieces, when he promptly recentres it. (The latitude allowed in centring the bubble by our gunners’ examination is responsible for 20 per cent. of our field probable error.) He must not fire the piece with a jerk but with a constant even pressure, else he may destroy all his accuracy of levelling. The same principle applies if he uses the lanyard. He keeps his quadrant free from any sign of dirt and assures himself that it is in perfect condition. If the gunner fails to keep his shoulder against the guard when the piece is fired he reminds him of it. In centring the bubble or setting the scales he gets his eye squarely opposite the scale or bubble.