| Year | 1999 |
| Date | 17-Dec |
| Volume | 183 |
| Issue | 4,109 |
| Page | 736 |
| Category | Optical |
| Part | 2 |
| Title | An Optical Comparator for the Home Workshop |
| Author | Richard E.Butterick (Canada) |
| Notes | Describes his design. Mirror mount, lamphouse, lampholder, cabinet, optical bench |