This desired result cannot be accomplished by two or three weeks a year of target practice. The training must be continuous for an extended period. To accomplish it altogether with ball cartridges would be too costly and often impracticable. The desired results can be obtained by pointing and aiming drills and gallery practice, if these are so conducted that the men never pull the trigger without properly bringing the rifle to the shoulder and looking through the sights at some target. A week of continuous work every six months will not accomplish the results; frequent short drill periods are necessary. A man who starts in by smoking three strong cigars every Christmas and Fourth of July but not touching tobacco between times will not be so likely to acquire the smoking habit as one who starts very moderately and repeats the act daily. Overdoing any kind of training at one time, with long intervals between has a tendency to produce dislike rather than a habit. A few minutes of honest work at least twice every week, in pointing and aiming drill and gallery practice, will accomplish the result desired and my experience convinces me that it also produces much better results on the target range than crowding even more of this practice into the last month before going on the range. Certainly it is worth more than the other as a habit-former. [Sidenote: Estimating the range] The better a man can shoot when the range is known to him the more important it is that his sight elevation be correct. A poor shot will scatter his bullets and may hit something even with a wrong elevation but the accurate shot will not hit anything; yet the correct range is valuable even to the poor shot. On the battlefield we can count only on our estimate of the range; seldom will it be practicable to determine it otherwise. Thus estimating distances has to be made a habit for two reasons: since habits alone count in battle, only by making it a habit can we depend on its being done; and second, it requires constant practice to enable men to estimate distances with fair accuracy. Devoting two or three consecutive days annually to estimating distances is almost a waste of time; practice should be had every week. I have seen both methods used and I am certain as to their relative values. How this instruction should be given will be mentioned later. The deployments, advancing the attack, working by signals, taking advantage of cover, and in fact everything pertaining to combat from the opening of fire until the end of the battle must be practiced until it becomes a fixed habit on the part of the men. [Sidenote: The officer as instructor]