=Trench Comforts.= A little study in the matter of personal comforts in the trenches will prove to be of great advantage to the men. The clothing should be tight fitting about the neck and waist to prevent falling earth and pebbles getting inside the clothing and working down into the boots. The men should be instructed to take a change of socks when they go in the trenches and it is also necessary not to forget to have a supply of smokes; in short, by paying attention to these small matters there may be many comforts enjoyed in the trenches which would otherwise be overlooked. =Uses of Bombs.=--The uses of bombs may be classified under two heads, =Defensive and Offensive=. =Defensive=: (a) Throwing from sapheads to prevent the enemy from pushing their saps too close to our trenches or strong places. (b) To combat the enemy’s enfilade attack in our trench should they be successful in gaining entrance thereto. (c) From concealed positions bombs may be used to break up and throw into confusion an enemy’s attacking force; this especially applies to night attacks when enemy is advancing in close formation. =Offensive=: (a) By throwing from sapheads when destroying the enemy’s keeps and strong places. (b) Supplying cover fire for wire cutters, sappers, etc. (c) Assisting in a frontal attack on an enemy’s position. (d) Following up advantages gained in a frontal attack by an enfilade attack to the flanks and our front from position gained in enemy’s trenches. =Advantages of Bomb and Grenade Fire Over Rifle Fire.= It must not be supposed that when advantages are claimed for bomb and grenade fire over rifle fire that the latter has not its advantages, too. The advantages of bomb and grenade fire must be at short range and are, therefore, specially adapted to the type of warfare waged at present on the Western front and may be considered as follows: (a) Owing to the high and pronounced trajectory we are able by the use of bombs to reach the enemy in his trench, whereas with rifle fire the only precaution necessary on the part of the enemy is to keep his head below the parapet, the trajectory of rifle fire being practically flat at point blank range. (b) It is possible with a single 2-pound bomb to obtain an effective zone of 20 yards and a danger space of 40 yards in the enemy’s trench which is dead ground to rifle fire. (c) The moral effect of bomb fire is much greater than that of rifle fire. =Means of Protection Against Enemy’s Bombs.= (a) =The Use of Wire Netting=: Trenches, machine gun pits, etc., are covered with close wire netting to prevent the entrance of enemy’s bombs. Low screens of wire netting may be placed in front of the parapet to prevent rolling bombs getting into our trenches.