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| DSC02715 | A tar pot was kept at all inclined planes to act as a lubricant. In cold weather, the tar had to be heated to spreadable consistency (hence the stone pit). | |
| Total images: 32 | Help | |
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| DSC02715 | A tar pot was kept at all inclined planes to act as a lubricant. In cold weather, the tar had to be heated to spreadable consistency (hence the stone pit). | |
| Total images: 32 | Help | |