Ductility is a property whereby a metal may be drawn out to form a wire. Some metals, like cast iron, have absolutely no ductility.
The metal which possesses this property to the highest degree, is platinum.
Wires of this metal have been drawn out so fine that over 30,000 of them laid side by side would measure only one inch across, and a mile of such wire would weigh only a grain, or one seven-thousandth of a pound.
Title: Practical Mechanics for Boys
Author: J. S. Zerbe