Some allowance in elevation also must be made for the direction of the wind: if it is powerful, and blows in a contrary direction to that in which the Rocket is projected, the frame requires _more_ elevation; for the wind acting more on the stick than the body of the Rocket, depresses the elevation in its rising. If, on the contrary, it blows in the direction of the Rocket’s flight, _less_ elevation is required; for, in this case, the Rocket mounts by the wind’s action on the stick. So, from the same cause, if the wind be strong, and across the range, though no difference of elevation is necessary, still an allowance must be made to leeward; for the Rocket, contrary to the course of ordinary projectiles, has a tendency to draw to windward: a few rounds, however, in all these cases, will immediately point out to the observant officer what is the required allowance. These remarks refer only to high angles; for no effect whatever is produced by the wind in the ground-ranges: in these the only caution necessary to be attended to is, to chuse the most smooth and level spot for the first 100 yards in front of the point from which it is intended to discharge these Rockets, as they generally travel in contact with the surface for this distance, not having acquired their full force, and are therefore more liable to deflection; but having at this point acquired a velocity not much less than the mean velocity of a cannon ball, they are not to be more easily deflected: at this distance also they rise a few feet from the ground, so as to clear any ordinary obstacles that may occur; insomuch that, if it were desired to fire Rockets at low angles into a besieged town, from the third parallel, these Rockets, having a clear space to acquire their velocity, in front of the parallel, would run up the glacis, clear the ditch, and skim over the parapet into the town; and would no doubt be of great use in a variety of cases, particularly in discomfiting and rendering the enemy unsteady, by pouring in vollies of some hundreds or even thousands on this principle, previous to an assault or escalade: indeed, knowing the effect, I do not hesitate to affirm that this manœuvre, practised _on the great scale_, would infallibly dislodge any enemy posted for the protection of a breach.