Depending on the requirements the combustible ingredients of gunpowder, i.e., charcoal, saltpetre and sulphur, need to be reduced to a high-quality powder of a particular particle size. This 19th century French pilon ( 'pestle') powder mill was driven by a waterwheel and had a mechanical system that caused the rise and fall of the two pestles in the mortars full of the mixture to produce the powder. A rate of 55-60 pestle strokes was maintained for several hours. An alternative to the pilon mill was the water cylinder mill. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Terry, Sheila |
Bildgröße: | 4602 px × 3797 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |