| Year | 1918 |
| Date | 05-Sep |
| Volume | 39 |
| Issue | 906 |
| Page | 139 |
| Category | Practical Letters from Our Readers |
| Part | |
| Title | Erroneous Teaching at Technical Schools - Electric Cell Grouping |
| Author | Frank Wright |
| Notes | Curve showing current plotted against cells in series |