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

[Mark Johnson]

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> 
To: "Antique Tractor Email Discussion Group" <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 < [ mailto:robinson46176 at gmail.com | 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/ | 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 | 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 
[ mailto:robinson46176 at gmail.com | robinson46176 at gmail.com ] 








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