Editing Loading coil (section)

===John Stone===
[[John Stone Stone|John S. Stone]] worked for the [[American Telephone & Telegraph Company]] (AT&T) and was the first to attempt to apply Heaviside's ideas to real telecommunications. Stone's idea (1896) was to use a bimetallic iron-copper cable which he had patented.<ref>Stone, M S, ''Electric Circuit'', US patent 0 578 275, filed 10 September 1896, issued 2 March 1897.</ref> This cable of Stone's would increase the line inductance due to the iron content and had the potential to meet the Heaviside condition. However, Stone left the company in 1899 and the idea was never implemented.<ref>Brittain pp. 40-41</ref> Stone's cable was an example of continuous loading, a principle that was eventually put into practice in other forms, see for instance [[#Krarup cable|Krarup cable]] later in this article.