| Year | 1901 |
| Date | 13-Jan |
| Volume | 4 |
| Issue | 43 |
| Page | 80 |
| Category | General |
| Part | |
| Title | A Correspondent seeks information |
| Author | |
| Notes | A small rotary fan, a portable acetylene generator, battery for charging accumulator, a model hot air engine, a model arc lamp, a miniature electric motor, a water motor |