Detectors 169
Detectors 169 : Particle Detectors: (4.18) Magnetic Detector: (4) Maintenance: In the Handbook of Technical Instruction for Wireless Telegraphists by: J. C. Hawkhead (Second Edition Revised by H. M. Dowsett) on pp 175 are detailed instructions and specifications for operation and maintenance of the Marconi's Wireless magnetic detector