=No. 5. Concentration and Distribution of Fire= [Sec. 44, paras. 8 and 9; and Sec. 54, para. 3 (v) to (vii) inclusive].--The broad principles which govern the concentration and distribution of fire may be illustrated by arranging figures representing troops in different formations, machine guns, etc., at various ranges on the Target, so that men can see the different kinds of targets against which fire will be concentrated or distributed. For instance, against a narrow-fronted column or machine gun fire will be concentrated, while against lines of infantry in extended order or the frontage of a defensive position fire will usually be distributed. Fire may, however, be concentrated if part of a line offers a favourable target through the men failing to keep their extension and crowding together, on the principle that fire should be concentrated against very vulnerable targets or at points where it will produce increased effect. =No. 6. Mutual Support and Covering Fire= (Sec. 44, paras. 12 and 13).--The broad principles governing the application of fire in mutual support and covering fire may be illustrated by arranging simple tactical schemes on the Target in the following manner: The firers will be divided into two fire-units, as in Demonstration No. 3. They are supposed to be part of a firing line in attack. To illustrate _mutual support_, one unit will be represented by a line of figures on Tier B, directly in front of it. When the figures are disappeared, the unit they represent is supposed to be halted, and when they are exposed, it is supposed to be advancing. The enemy’s position will be indicated as a definite frontage in front of each unit on the scenery above Tier A, or the scenic accessories on this tier. While both units are supposed to be firing during a halt, the figures on Tier A will be exposed, denoting that one unit is advancing. The commander of the other unit will at once direct fire from part of his unit in rapid fire against the front of the enemy’s position to the front of the advancing unit, while keeping the enemy’s position to his front under fire from the rest of his unit. To illustrate _covering fire_, a line of figures on Tier B will represent the firing line of an attack, to which the firers are supports on high ground. The enemy’s front will be indicated on Tier A. When the figures are exposed, denoting an advance by the firing line, the supports will cover the advance by delivering heavy fire at the enemy’s position to the front of the figures.