| Year | 1911 |
| Date | 23-Mar |
| Volume | 24 |
| Issue | 517 |
| Page | 288 |
| Category | Answers to Correspondents |
| Part | |
| Title | Wheatstone apparatus in Herbert's "Telegraphy", magneto, see Avery's "A.B.C. of Dynamo Design" and our handbook "Small Dynamos and Motors" |
| Author | G.G.P. |
| Notes |