☙

coomb

1

In Norfolk, England, a unit of mass = 252 pounds avoirdupois.

2

In England, at least as early as the 13ᵗʰ – 19ᵗʰ century, a unit of dry capacity = 4 bushels. The coomb is a Saxon unit of capacity whose precise value is not known. By the 13ᵗʰ century written records define it as = 4 bushels, or half a quarter. Also spelled coom, koome, coombe, coumb, coome and (in Latin documents) cumba. A synonym is carnock. The word is from the Old English cumb, meaning vessel or measure.

sources

A Coom. At all places I meet with Bushels...4.

John Houghton.
A Collection of Letters for the Improvement of Husbandry and Trade.
Issue #46, of 23 June 1693. Page 133 in the collected 4-vol edition.

Hundred Rolls of Lynn 1275. Robert de Tateshall and Robert de M-------- had the monopoly of measuring corn in the harbour with a measure called a “cumb” namely ½ Quarter; which measure they farmed out and the farmers ought to hire out these measures by the day to any merchant coming down the river for ½^d a day, and to merchants from overseas for 1^d a day, but they actually charged 2/- or more and some measures contained more and some less whereas they all ought to be equal.

As quoted in A. Robinson.
A Record of the Old Weights and Measures in Norfolk.
Norfolk Archaeology, vol. 25, Part 2, page 212 (1933).

Coomb, sb. four bushels, half a quarter.

William Humphrey Marshall.
Provincialisms of East Norfolk.
Rural Economy of Norfolk. Vol. II. 2^nd edition.
London: 1795.