| Year | 1923 |
| Date | 18-Oct |
| Volume | 49 |
| Issue | 1,173 |
| Page | 435 |
| Category | Workshop Topics |
| Part | |
| Title | The Practical Details in Making a Spherical Variometer Inductance |
| Author | |
| Notes | Making the rotor block, setting out and cutting the template, turning the outside of the block, fitting the rotor spindle, winding the rotor, testing the rotor winding, the wood blanks for the stators |