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1. Chapter 1 2. 1835. 1885. 3. 1835. 1885. 4. Part 1 of 2 5. Part 2 of 2 6. Part 1 of 2 7. Part 2 of 2 8. 1. Torpedo-cruisers 9. 2. Torpedo despatch-boats 10. 3. Sea-going torpedo-boats 11. 4. Coast-guard torpedo-boats 12. 5. Picket torpedo-boats 13. Part 1 of 2 14. Part 2 of 2 15. 1. Eleven protected steel cruisers: eight to be of 3200 tons, and 16. 2. Six steel torpedo-cruisers of 1500 tons displacement and a speed 17. 3. Four torpedo-cruisers of 1100 tons displacement, to develop a 18. 4. Twelve steel torpedo gun-boats, six to be of 600 tons 19. 5. Sixteen steel torpedo gun-boats of 200 or 250 tons displacement, 20. 6. Ninety-six torpedo-boats, 100 to 120 tons displacement, with a 21. 8. One transport of 3000 tons, to be equipped as a floating arsenal 22. 9. Twenty steel steam-launches of from 30 to 35 tons displacement, 23. 1887. She is built of steel, is 320 feet in length, 50 feet 7 inches 24. Part 1 of 2 25. Part 2 of 2 26. introduction of the rifled cannon, and its subsequent development, 27. Part 1 of 3 28. Part 2 of 3 29. Part 3 of 3 30. introduction of the rifle system, the call for higher velocities, the 31. 1841. He utilized it by enclosing a tube of cast-iron or steel in 32. Part 1 of 2 33. Part 2 of 2 34. introduction the demand for larger calibres by most of the prominent 35. 1. Submarine boats have been built in which several persons have 36. 2. Submarine boats have been propelled on and under the surface in 37. 3. The problem of supplying the necessary amount of respirable air 38. 4. Steam, compressed air, and electricity have been used as the 39. 5. The incandescent electric light has been used for illuminating the 40. 6. Seeing apparatus have been made by which the pilot, while under 41. 7. A vessel has been in time of war destroyed by a submarine boat. 42. 1. It does not need so much speed. The surface boat demands this 43. 2. Its submersion in the presence of the enemy prevents the engines 44. 4. The boat and crew, being under water, are protected from the fire 45. 5. It is enabled to approach the enemy near enough to make effective 46. 7. It can examine the faults in the lines of submarine mines, and 47. introduction of rapid-fire guns has such an important influence on