| Year | 1904 |
| Date | 04-Feb |
| Volume | 10 |
| Issue | 145 |
| Page | 104 |
| Category | Electrical |
| Part | |
| Title | A Four-Cell Chromic Acid Battery |
| Author | P.H.Revell |
| Notes | General arrangement, detaching element from frame, arrangement of hook & peg, sheet brass mount for carbons, fixing zinc plate |