linguistic:paraphrasing, structural:scholar_edition
Other uses

Natural graphite has found uses in zinc-carbon batteries, electric motor brushes, and various specialized applications. Railroads would often mix powdered graphite with waste oil or linseed oil to create a heat-resistant protective coating for the exposed portions of a steam locomotive's boiler, such as the smokebox or lower part of the firebox. The Scope soldering iron uses a graphite tip as its heating element.