| Year | 1908 |
| Date | 20-Feb |
| Volume | 18 |
| Issue | 356 |
| Page | 172 |
| Category | Electronic |
| Part | |
| Title | Recent Developments in X-Ray Apparatus |
| Author | |
| Notes | Leslie Miller's mica disc valve, driven by moto-magnetic interrupter, moto-magnetic interrupter by Messrs Newton & Co., Messrs The Sanitas Electrical Co.'s new mercury interrupter & complete X-ray outfit with "Sanax" interrupter, Messrs Siemens Bros' controlling switchboard for X-ray work & triple anode Wehnelt interrupter |