| Year | 1908 |
| Date | 05-Mar |
| Volume | 18 |
| Issue | 358 |
| Page | 232 |
| Category | Electronic |
| Part | |
| Title | Recent Developments in X-Ray Apparatus |
| Author | |
| Notes | Photographs of discharges obtained from a Schall induction coil worked by Wehnelt & mercury jet interrupters, K.Schall's control switchboard, with glass-protected contacts, K.Schall's orthodiagraph for making drawings of heart, an orthodiagraph sketch, A.E.Dean's universal electro-motor for medical purposes |