| Henry Maudslay | Frontispiece | |||
| Fig. | 1. | Smeaton’s Boring Machine, Carron Iron Works, 1769 | Facing page | 2 |
| Fig. | 2. | French Lathes of about 1772 | Facing page | 2 |
| Fig. | 3. | French Slide-Rest, 1772 | Facing page | 6 |
| Fig. | 4. | French Lathe for Turning Ovals, 1772 | Facing page | 6 |
| Fig. | 5. | Genealogy of the Early English Tool Builders | page | 7 |
| Fig. | 6. | John Wilkinson | Facing page | 14 |
| Fig. | 7. | Wilkinson’s Boring Machine | Facing page | 14 |
| Fig. | 8. | Eminent Men of Science Living in 1807-8 | Facing page | 20 |
| Fig. | 9. | Sir Samuel Bentham | Facing page | 22 |
| Fig. | 10. | Sir Marc Isambard Brunel | Facing page | 26 |
| Fig. | 11. | Brunel’s Mortising Machine | Facing page | 30 |
| Fig. | 12. | Brunel’s Shaping Machine | Facing page | 30 |
| Fig. | 13. | French Screw-Cutting Lathe, Previous to 1569 | page | 37 |
| Fig. | 14. | French Screw-Cutting Lathe, about 1740 | page | 37 |
| Fig. | 15. | Maudslay’s Screw-Cutting Lathe, about 1797 | Facing page | 42 |
| Fig. | 16. | Maudslay’s Screw-Cutting Lathe, about 1800 | Facing page | 42 |
| Fig. | 17. | French Planing Machine by Nicholas Forq, 1751 | Facing page | 50 |
| Fig. | 18. | Matthew Murray | Facing page | 58 |
| Fig. | 19. | Richard Roberts | Facing page | 58 |
| Fig. | 20. | Roberts’ Planer, Built in 1817 | Facing page | 60 |
| Fig. | 21. | Roberts’ Back-Geared Lathe | Facing page | 60 |
| Fig. | 22. | James Nasmyth | Facing page | 82 |
| Fig. | 23. | First Sketch of the Steam Hammer, November 24, 1839 | Facing page | 94 |
| Fig. | 24. | Model of the First Steam Hammer | Facing page | 94 |
| Fig. | 25. | Sir Joseph Whitworth | Facing page | 102 |
| Fig. | 26. | Samuel Slater | Facing page | 122 |
| Fig. | 27. | Genealogy of the New England Gun Makers | page | 139 |
| Fig. | 28. | The First Milling Machine, Built by Eli Whitney about 1818 | Facing page | 142 |
| Fig. | 29. | Blanchard “Gun-Stocking” Lathe, Built in 1818 for the Springfield Armory | Facing page | 142 |
| Fig. | 30. | Eli Whitney | Facing page | 152 |
| Fig. | 31. | Samuel Colt | Facing page | 164 |
| Fig. | 32. | The Colt Armory | Facing page | 168 |
| Fig. | 33. | Root’s Chucking Lathe, about 1855 | Facing page | 170 |
| Fig. | 34. | Root’s Splining Machine, about 1855 | Facing page | 170 |
| Fig. | 35. | Francis A. Pratt | Facing page | 178 |
| Fig. | 36. | Amos Whitney | Facing page | 178 |
| Fig. | 37. | Genealogy of the Robbins & Lawrence Shop | page | 187 |
| Fig. | 38. | Robbins & Lawrence Armory, Windsor, Vt. | Facing page | 190 |
| Fig. | 39. | Frederick W. Howe | Facing page | 196 |
| Fig. | 40. | Richard S. Lawrence | Facing page | 196 |
| Fig. | 41. | James Hartness | Facing page | 198 |
| Fig. | 42. | Joseph R. Brown | Facing page | 202 |
| Fig. | 43. | First Universal Milling Machine, 1862 | Facing page | 208 |
| Fig. | 44. | Early Micrometer Calipers | Facing page | 212 |
| Fig. | 45. | Genealogy of the Worcester Tool Builders | page | 223 |
| Fig. | 46. | Lucius W. Pond | Facing page | 228 |
| Fig. | 47. | Salmon W. Putnam | Facing page | 228 |
| Fig. | 48. | Hiram W. Hayden | Facing page | 232 |
| Fig. | 49. | Israel Holmes | Facing page | 232 |
| Fig. | 50. | Genealogy of the Naugatuck Brass Industry | page | 235 |
| Fig. | 51. | William Sellers | Facing page | 248 |
| Fig. | 52. | Coleman Sellers | Facing page | 252 |
| Fig. | 53. | William B. Bement | Facing page | 252 |
| Fig. | 54. | Worcester R. Warner | Facing page | 262 |
| Fig. | 55. | Ambrose Swasey | Facing page | 262 |
| Fig. | 56. | The “Mult-au-matic” Lathe, 1914 | Facing page | 276 |
| Fig. | 57. | Machine Tool Building Area of the United States, 1915 | page | 279 |