| Year | 1926 |
| Date | 10-Jun |
| Volume | 54 |
| Issue | 1,309 |
| Page | 548 |
| Category | Optical |
| Part | |
| Title | Making Primitive Objective Lenses for the Microscope |
| Author | Frank Mason |
| Notes | General view of completed apparatus and instrument, glass rod being heated in Bunsen frame, lens mounted for use, grinding plate, lens mounted for grinding, after grinding |