| Year | 1906 |
| Date | 02-Aug |
| Volume | 15 |
| Issue | 275 |
| Page | 111 |
| Category | Electronic |
| Part | 8 |
| Title | Induction Coils for X-Ray and Other Purposes |
| Author | John Pike |
| Notes | Breaks. "Apps" break, "Vril" break, break & commutator board for coil, motor mercury break, bracket for mercury break, details of mercury break, regulator for mercury cup, connections, portable switchboard |