| Year | 1907 |
| Date | 31-Jan |
| Volume | 16 |
| Issue | 301 |
| Page | 100 |
| Category | General |
| Part | |
| Title | A Model Engineers' Tramp Abroad |
| Author | |
| Notes | Casting a large telescope lens, Carl Ziess Optical Works, machine for polishing large lenses, machining horseshoe bases of microscopes, mounting microscope-objective lenses |