Hi Brent,

Doing a lot of machinist work these days, all the Knew Concepts

stuff is based in English, but in thousandths of an inch. (decimal

inches) rather than fractions.

I don’t care which system, really, just don’t ask me to figure out

whether or not 33/64 is bigger than 7/16. No fractions! (and don’t

ask me to convert. Just pick a system and stick with it.)

Actually, I sat down and thought about it for a second, in my

’medieval metalsmith’ mindset.

The original english system of 12ths *does* make sense, for a

population that were pretty much illiterate, and didn’t understand

math either.

Running in 12ths is the lowest denominator that lets you handle

quarters and thirds easily, while still handling halves. Which was

about as much as most people needed to do. For hundreds of years.

Switching to 24ths gives you the same ease of thirds or quarters,

while doubling the resolution. Suddenly begin to notice that karats

run in 24ths? It made the math easy. Same origin for sterling.

(.925) I don’t remember what the math was, but it had something to

do with some sort of easily derived set of weight proportions that

got you to.925.)

For serious work: decimal all the way.

Regards,

Brian