There were three metal objects with dials and switches; machines I'll call them, from which the wires ran.
The unmistakable snap of wires reached them, and the helicopter tilted.
In the earliest the conductor was represented by long metal wires, supported by silk or other insulating material, and left to pick up the air's potential.
The micrometer of Auzout and Picard was provided with silk fibres or silver wires instead of the edges of Gascoigne, but one of the silk fibres remained fixed while the other was moved by a screw.
As the powers of the telescope were gradually developed, it was found that the finest hairs or filaments of silk, or the thinnest silver wires that could be drawn, were much too thick for the refined purposes of the astronomer, as p p they entirely obliterated the image of a star in the more powerful telescopes.