|
 |  Photo collection by Th.Schiöler Water-lifting by draught animals Gearwheel with eight cogs Photo 89 |
| Gearwheel with eight cogs |
 |
 | |
| Abandoned shaft with cogs, from Syria This cogwheel has a journal of iron and eight cogs made of four beams. The total weight must be around half a ton. [89] |