| Year | 1946 |
| Date | 18-Jul |
| Volume | 95 |
| Issue | 2,358 |
| Page | 58 |
| Category | Optical |
| Part | |
| Title | A Reflecting Telescope Speculum |
| Author | L.C.W.Holt |
| Notes | Beyond the power? Silvering, speculum and tool in section, testing the curvature, polishing, method of mounting the diagonal reflector, eye-pieces |