CHAPTER 1. The ordnance problem 21 2. Gun production 38 3. Mobile field artillery 56 4. Railway artillery 91 5. Explosives, propellants, and artillery ammunition 103 6. Sights and fire-control apparatus 135 7. Motorized artillery 148 8. Tanks 154 9. Machine guns 158 10. Service rifles 177 11. Pistols and revolvers 187 12. Small-arms ammunition 191 13. Trench-warfare material 200 14. Miscellaneous ordnance equipment 221 BOOK II--THE AIR SERVICE. CHAPTER 1. The aircraft problem 235 2. Airplane production 239 3. The Liberty engine 265 4. Other airplane engines 281 5. Aviation equipment and armament 294 6. The airplane radio telephone 323 7. Balloons 331 BOOK III--THE ENGINEER CORPS. CHAPTER 1. The Engineers in France 347 2. Military railways 367 3. Engineer activities at home 375 4. Sound and flash ranging and searchlights 383 BOOK IV--CHEMICAL WARFARE. CHAPTER 1. Toxic gases 395 2. Gas defense equipment. 410 BOOK V--QUARTERMASTER ACTIVITIES. CHAPTER 1. Subsistence 435 2. Clothing and equipage 453 3. Miscellaneous quartermaster undertakings 475 4. Motor and horse-drawn vehicles 496 5. Medical and dental supplies 511 6. Salvage 517 BOOK VI--THE CONSTRUCTION DIVISION. CHAPTER 1. Cantonments and camps 535 2. Miscellaneous construction 548 BOOK VII--THE SIGNAL CORPS.