| Year | 1923 |
| Date | 11-Jan |
| Volume | 48 |
| Issue | 1,133 |
| Page | 44 |
| Category | Radio Engineering |
| Part | |
| Title | Notes on the L.T. Current |
| Author | |
| Notes | Series-parallel grouping of primary cells for filament lighting, gravity type Daniell cell, arrangement of Daniell cells for charging accumulators for filament lighting |