| Year | 1930 |
| Date | 13-Feb |
| Volume | 62 |
| Issue | 1,501 |
| Page | 159 |
| Category | Exhibition |
| Part | |
| Title | Exhibition of Scientific Instruments. The Physical Society and the Optical Society. New Section for Apprentices and Learners |
| Author | |
| Notes | Apprentices and learners' competition, the exhibition in general, photographing the unseen, engineering appliances, models, lectures, lighting of machinery |