After sulphur and saltpetre,charcoal is the third constituent of gunpowder. It is produced by the carbonisation of wood by the process of pyrolysis in which the timber is broken down into elemental carbon and residue at a high temperature but without burning. This form of charcoal kiln is known as an earth clamp and is a traditional woodland type | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Terry, Sheila |
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