LECTURE III.--Study of a Few Types of Rifle and Hand Grenades 17 LECTURE IV.--Bombers’ Training, Parts I. and II. 23 LECTURE V.--Frontal Attack 32 LECTURE VI.--Consolidating the Ground Gained 34 LECTURE VII.--Enfilade Attack 35 SYLLABUS (Six Days’ Training) 37 LIST OF MATERIAL AND EQUIPMENT FOR CLASS OF 50--(Six Days’ Training) 38 ORAL EXAMINATIONS 39 SAPHEADS. [Illustration: Diagram 1. T. Shaped] [Illustration: Diagram 2. Island Saphead] Diagram 1. (a) Bombs can only be thrown from narrow trenches in the direction to which the trench is running. In order to have complete command of foreground with this type of Sap. it is necessary to make the cross-head too wide. (b) The total area of Sap. may become effective zone from the fire of one bomb. (c) Only two men can be employed at one time in constructing this type of Sap. Diagram 2. (a) Offers complete range of foreground with the narrowest possible width of trench. (b) Cannot become effective zone from the fire of one bomb. (c) A greater fighting area is possible in the same extent of frontage. (d) When connected up to form line of trenches from which to make assault, takes the place of an island traverse and relieves congestion of traffic at junction of communicating trench and fire trench. (e) More men can be employed in constructing same than in the T-shaped type. Bombers’ Training LECTURE I. EXPLOSIVES. Working Knowledge. =Handling.= In moving cases containing explosives great care should be taken that they are not placed on anything or in such a position that they might topple over or be knocked over, or placed in such a position that other objects might fall on them. Men who are entrusted with the handling of these materials should be most reliable and careful. =The Thawing of Frozen Explosives.= Some explosives freeze in a temperature considerably above freezing point, and it is necessary that they be thawed before using. The two recognized methods of thawing frozen explosives are as follows: 1. Place in a steam heated room, but not on the steam pipes. It is desirable that the room have an even temperature. 2. By the use of a double heater; the outer vessel to contain water at a temperature of 125 deg. F., or not hotter than can be borne by the hand; the inner vessel contains the explosive, care being taken that there is no fire in the vicinity. =A Few Causes of Accidents with Dynamite.= The following are a few of the causes of accidents with explosives, as taken from statistical information compiled by the Ontario Bureau of Mines, and circulated for the purpose of preventing accidents:-- Dynamite. 1. Forcing primer into hole which is too small for it.