| Year | 1930 |
| Date | 25-Dec |
| Volume | 63 |
| Issue | 1,546 |
| Page | 612 |
| Category | Electrical |
| Part | 3 |
| Title | Country House Electric Lighting Plants. Maintenance of the Battery |
| Author | Frederick H.Taylor |
| Notes | Maintenance of the battery, sediment or "sludge", "topping up", colour of the plates, amount of re-charge, life |