| Year | 1944 |
| Date | 06-Apr |
| Volume | 90 |
| Issue | 2,239 |
| Page | 322 |
| Category | Internal Combustion |
| Part | 1 |
| Title | Ignition Equipment. Principles and Practice (continued) |
| Author | Edgar T.Westbury |
| Notes | Elementary form of rotary armature magneto, distinctive features, reversals of magnetic flux through magneto armature (B.T.H.), rotary armature magnetos, field distortion, belt-driven low-tension magneto, B.T.H. type GA4 magneto |