a soldering iron would have been a large lump of copper on a shaft, with a wooden handle. You would heat it in a gas flame, and use its pointed end for your soldering. Electric irons have made ...

These power the ceramic heating element, as well as provide the soldering iron handle access to the thermocouple that’s placed near the actual tip. With a simple diagram [Clive] explains how ...

Petrified wood is one of the most sought-after materials in the world for both its aesthetic value and its scientific value.