| Year | 1927 |
| Date | 22-Dec |
| Volume | 57 |
| Issue | 1,389 |
| Page | 594 |
| Category | Electrical Work |
| Part | |
| Title | Two Chemical Rectifiers |
| Author | R.Raggatt |
| Notes | Diagram of connections of large rectifier, diagram illustrating the direction of current through accumulator during negative and positive half wave, connected for charging accumulators, small rectifying cell, complete H.T. battery eliminator |