Newcastle Chaldron

An industrial shipping measure optimised for northeastern coal carts and river barges, roughly double the London variant.

The Newcastle chaldron was built for heavy pithead production and bulk river transport rather than direct retail delivery. It accounted for the physical dimensions of regional coal waggons and keels, making it a foundational unit of the early industrial coal trade before arriving at southern ports. The figure changed over time. Coal measures were revised repeatedly by statute and by local agreement, and a chaldron in 1600 was not a chaldron in 1800: the Newcastle measure in particular grew as waggons and keels grew, with the trade periodically re-fixing it to match what was actually being moved. Any single figure for a chaldron needs a date attached to be meaningful, and the value here reflects the measure as it stood in the later period of the trade.