ABSTRACT
The magnetic detector was already proving to be a great asset to the Company by reason of the greatly increased speeds in reception which it permitted. The coherer, which it deposed, had been developed into a reasonably reliable performer, but its Achilles heel was its slow speed; this shortcoming was inherent, because, after the passage of every wavetrain, the filings had to be restored to their former sensitive condition by tapping or otherwise physically loosening the metal particles.
