| Year | 1923 |
| Date | 25-Oct |
| Volume | 49 |
| Issue | 1,174 |
| Page | 461 |
| Category | Workshop Topics |
| Part | |
| Title | The Practical Details in Making a Spherical Variometer Inductance |
| Author | |
| Notes | Turning the stator blocks, turning out the hollow, making the winding former, winding the former, transferring the winding to the stator, assembling the variometer, making the terminals |