Imperial Binary Liquid Measure.
Jun. 28th, 2010 01:04 amI was first introduced by Knuth to the fact that the customary US version of the imperial systems for measuring liquids was a binary system. By 'Binary' I mean that there are names for each doubling of units. Of course, due to drift over time, disagreements, differences of law and so on, these have strayed away from what was once, at least in principal, a simple system. I'm writing it down here, because I can never keep it straight in my head. Oh, and naturally all of the units below are the liquid versions of those units that have dry equivalents:
The system appears to break down for units under an ounce (although a Dram is tradionally 1/8 ounce), and for units over 1 Tun (which often weighs about a Ton) for which units of weight were used instead.
Imperial Binary Liquid Measure | |||
---|---|---|---|
Unit Name | Usual Measure | Liquid Ounces | |
2x | Number | ||
Ounce | 1 Ounce | 0 | 1 |
Jack | 2 Ounces | 1 | 2 |
Gill | 4 Ounces | 2 | 4 |
Cup | 1 Cup | 3 | 8 |
Pint | 2 Cups | 4 | 16 |
Quart | 4 Cups | 5 | 32 |
Pottle | 8 Cups | 6 | 64 |
Gallon | 1 Gallon | 7 | 128 |
Peck | 2 Gallons | 8 | 256 |
Bucket | 4 Gallons | 9 | 512 |
Firkin | 8 Gallons | 10 | 1024 |
Kilderkin | 16 Gallons | 11 | 2048 |
Barrel | 32 Gallons | 12 | 4096 |
Hogshead | 64 Gallons | 13 | 8192 |
Butt | 128 Gallons | 14 | 16386 |
Tun | 256 Gallons | 15 | 32768 |
The system appears to break down for units under an ounce (although a Dram is tradionally 1/8 ounce), and for units over 1 Tun (which often weighs about a Ton) for which units of weight were used instead.