On 26 May 2010 at 15:18, John Foust wrote:
Wikipedia says "The saying "a pint's a
pound the world around" refers
to 16 US fluid ounces of water weighing approximately one pound
avoirdupois in the United States... In the rest of the
English-speaking world, an Imperial pint-being 20 Imperial ounces of
water-will weigh one and a quarter pounds."
Exactly the rule of thumb I learned it as a kid. To this day, it has
told me that a 250 gallon tank filled with water sitting in the back
of my pickup weighs about a ton, plus whatever the (PVC) tank weighs.
A little 50 gallon water-filled tank weighs more than 400 lbs.
...another rule of "thumb" is that the distance from the tip of your
thumb to the knuckle is about an inch. In my case, it's more
accurate than "three barleycorns, dry and round" from my pantry,
which measured only about 3/4 of an inch.
--Chuck