[AT] Supposedly why our old tractors are not metric and a fairly simple tutorial

[Stephen Offiler]

I haven't see Mark's message yet, but I just saw Cecil's reply.  Yes, I am
aware of that (not the cornbread!).  In fact, most scientific calculators
have a "D-R-G" button that puts the calc into either degree mode, radian
mode, or grad mode.  A grad is 1/400 of a circle.  I must admit I wasn't
recognizing this as quite metric.  But Mark is right - it would be a metric
right triangle with 100 divisions.  I have never encountered the actual use
of grads anywhere outside an obscure trigonometry class once upon a time.
So I still submit that in practice neither the circle nor time are metric.

SO


On Mon, Feb 24, 2020 at 4:43 PM Cecil Bearden <crbearden at copper.net> wrote:

> Does this mean that we use cornbread for a factor instead of PI?
> Cecil
> On 2/24/2020 2:09 PM, Mark Johnson wrote:
>
> There is an 'alternative' degree system where a full circle is 400 degrees
> and a right angle is thus 100 degrees instead of 90. I haven't played with
> the math implications, but it seems logical that all triangles in such a
> system would have angles adding up to 200 degrees.
>
> The trig tables would look a bit strange at first but I think all the
> identities will work regardless of the metric.
>
> Mark J
>
> ------------------------------
> *From: *"Stephen Offiler" <soffiler at gmail.com> <soffiler at gmail.com>
> *To: *"Antique Tractor Email Discussion Group"
> <at at lists.antique-tractor.com> <at at lists.antique-tractor.com>
> *Sent: *Monday, February 24, 2020 8:32:41 AM
> *Subject: *Re: [AT] Supposedly why our old tractors are not metric and a
> fairly simple tutorial
>
> Metric time?  Say 10 metric hours per day, 100 metric minutes per hour...
> why don't we do that?
> Metric circles?  Why not divide into 100, or 1000 parts rather than 360?
>
> SO
>
> On Mon, Feb 24, 2020 at 9:09 AM Indiana Robinson <robinson46176 at gmail.com>
> wrote:
>
>> I'm not sure how accurate this story is but it matches what I had read
>> for years.
>> https://www.thevintagenews.com/2018/04/12/metric-system-usa/
>>
>> If they had listened to Jefferson we would  not be messing with a double
>> system, metrics would just be what we use...  The 10 based system can be
>> done in  your head (could have saved all those years learning those damned
>> fractions)  :-)  and every tool box wouldn't have a fraction to decimal
>> conversion chart tucked in somewhere that you can't ever find when you need
>> it. Also we would not have to worry about some dead kings thumb size
>> getting lost or a bad few years for the barley crop or a lot of other stuff
>> they tried to set as standards long ago.
>>
>> This site looks fairly well done and I liked the little section on the
>> metric size of a few common objects.
>>
>> https://www.wikihow.com/Measure-Centimeters?fbclid=IwAR1z77b9GTGRpTD7TM1cH51LA1CKzsTyPJ-n87HsRDmbJv7b5ME7QyCVpbs
>>
>> If you have forgotten how to use your Abacus there is a section on that
>> too.  :-)
>>
>>
>> .
>>
>> --
>> --
>>
>> Francis Robinson
>> aka "farmer"
>> Central Indiana USA
>> robinson46176 at gmail.com
>>
>>
>>
>>
>>
>>
>>
>>
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