| PAGE | Introduction | vii | Location and Construction of Trenches | 1 | Dugouts | 19 | Resistance of Roofing Materials | 24 | Dumps | 25 | Latrines | 27 | Revetments | 28 | Sand Bags | 29 | Corrugated Iron | 32 | Fire Platforms | 34 | Traverses | 36 | Listening Posts | 38 | Observation Posts | 43 | Loopholes for firing | 43 | Support Trenches and Support Dugouts | 45 | Support Points | 46 | Reserve Dugouts | 47 | Second Line | 47 | Communication Trenches | 48 | Sketch of Trench System | 56 | Section I | 56 | Section II | 58 | Section III | 63 | Section IV | 67 | Telephone Lines | 68 | Recesses | 69 | Notice Boards | 70 | Trench Drainage | 72 | Floorboards | 77 | Brushwood and Straw | 79 | Working Parties | 80 | Reliefs | 81 | Traversed Fire Trenches | 83 | Obstacles and Entanglements | 84 | Low Wire Entanglements | 85 | High Wire Entanglements | 86 | Abatis | 88 | Barricades | 88 | Inundations | 89 | Fougasses | 89 | Organization of Bombing Squads | 90 | Training | 91 | Explosives | 101
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