| Year | 1919 |
| Date | 03-Apr |
| Volume | 40 |
| Issue | 936 |
| Page | 230 |
| Category | Electrical |
| Part | |
| Title | The Conversion and Rectification of Alternating Currents |
| Author | "Calculus" |
| Notes | Direct versus alternating currents, motor generators and converters, diagram of connections for a small mechanical rectifier made by the American Westinghouse Co., rectifiers for small outputs, the mercury vapour rectifier, diagram of connections of a mercury vapour rectifier, connections for a mercury vapour rectifier fitted to an electric locomotive, the tungar rectifier, a half-wave rectifier connected up to an accumulator and regulating resistance |