This one came over the transom from the mil email…
The question-
“Why does a mile have 5280 feet, that doesn’t make any sense? Everything should just be decimal metric”
The answer-
Actually it makes perfect sense when you know something about surveying land, and farming, and commerce in commodities and crops, and the history of all of the above.
5280 feet is evenly divisible by 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 22, 24, 32, 40, 48, 66, 80, 96, 100, and 120.
Those are all the customary divisions, fractions, and factors, used in surveying, farming, and commerce, for literally over a thousand years… Except 64, 144, and 128, but you can get to each of those by evenly dividing, adding, or multiplying the other fractions.
A mile is 1760 yards, or 80 surveyor’s chains long… And both of those are evenly divisible into most of the customary fractions as well (a surveyors chain is 22 yards or 66 feet long)
A square mile is easily evenly measured by surveyor chains. It is evenly divisible into 640 acres, or 80 surveyor’s chains squared. All its major fractions are evenly divisible by acres and chains. A quarter square mile is exactly 160 acres. An eighth square mile is exactly 80 acres. A 16th square mile is exactly 40 acres, and so on.
A distance of 5 chains, or 1/16th of a mile or 330 feet long; by 2 chains or a 40th of a mile, or 132 feet wide, is 10 square chains, or one acre.
These were all customary sizes for land parcels and especially for farming…. In fact they still are.
Almost ALL the English customary units make much more sense than metric decimal units, when you understand how they got to be customary units… And when you understand it’s because they are all easily evenly fractioned or factored or multiplied into their larger or smaller customary units.
At which point they become just as intuitive and make just as much sense as decimal units… Or in the context of farming and commerce in actual physical objects, more so, because decimal units can’t be evenly divided in nearly as many ways….
A dozen can be evenly divided into halves, thirds, quarters, or sixths, which can then be evenly divided further into eighths and twelfths. That’s all the customary fractions used in farming and day to day commercial trading for over 1000 years.
You can always evenly divide something in half, even when you don’t have precision instruments or a calculator. Then from there you can get quarters, eights, sixteenths etc… and by evenly splitting, multiplying, and adding, you can get to almost any fraction or multiple, evenly, and in your head, or with actual physical objects or substances in front of you… No scales or measuring tools needed.
It’s why base 12, or base 16, or base 64, are actually much better number systems than decimal. Much more evenly divisible fractions.
And since much of the USA was divided by acres back in the day… And our predecessors came from England, many from ‘rural’ England, it does make perfect sense. Also, we were smart enough NOT to bow to the rest of the world and go along with the metric crap… 🙂