Answers are grounded in this paper and cite their sources.
In working with coherers, made of iron or steel, some special difficulties are encountered in the warm and damp climate of Bengal. The surface of the metals soon gets oxidised, and this is attended with variation of sensitiveness of coherer. The sensitiveness, it is true, does not altogether disappear, but it undergoes a considerable diminution.
No takes yet. Share an insight, caveat, or question.
Jagadis Chunder Bose (1900) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: