| Year | 1914 |
| Date | 16-Jul |
| Volume | 31 |
| Issue | 690 |
| Page | 52 |
| Category | Electronic |
| Part | |
| Title | The D.C. Arc for Wireless Telegraphy and Telephony |
| Author | G.G.Blake |
| Notes | Speaking arc methods, speaking arc: Duddell's connections. Paper read before the Wireless Society of London. Experiment 1. Speaking arc, the thermophone. Experiment 2. Musical arc. Ruhmer's photophonic transmitter & receiver, soot cell, thermophone, selenium cell, Duddell's musical arc. Experiment 2. View of the apparatus, simple form of arc generator, Poulsen's arc with magnetic blast, De Forest's method |