| Year | 1912 |
| Date | 19-Dec |
| Volume | 27 |
| Issue | 608 |
| Page | 585 |
| Category | Electronic |
| Part | |
| Title | A Complete Set of High Frequency Apparatus |
| Author | Douglas A.Smith |
| Notes | The winder, the spark coil, the turbine mercury break, complete set, the gas bags, the high-tension condenser, the spark gap, the Tesla coil, experiments, diagram of connections |