7 Mar
2013
7 Mar
'13
9:43 a.m.
On Thu, 7 Mar 2013, Jim Stephens wrote:
Wikipedia might have a photo of a rule similar to mine
along with a
verifiable explanation of what the length of that spiral scale is. I
didn't and my rule was buried. I already said I brain farted an quoted
a bad stat.
'sOK It happens
I was not going to do wikipedia w/o verification or
because
the math is too hard. I did it because I have no idea how many times
the scale went round, and didn't want to guess. Is guessing and babble
better than wikipedia even if the math is right?
maybe :-) certainly more fun
So, is it a flat spiral or a helix?
Either one at 10" diameter is an impressively long scale, for a LOT of
accuracy!