| Year | 1956 |
| Date | 05-Apr |
| Volume | 114 |
| Issue | 2,863 |
| Page | 554 |
| Category | Electrical |
| Part | |
| Title | Electrical Design Simplified. Basic theory |
| Author | J.Gordon Hall |
| Notes | Flow of electric current, Ohm's law, heating and magnetic effects of current. Electricty and water, heating effect of current, calculating the work done, horse-shoe magnet with keeper, keep air gaps short, dynamo-electric effect, dynamo or motor |