May I also lament the lack of donkeypower for those days when the
supermarket has just plain run out of horses.


On Wed, Oct 13, 2010 at 08:02:47PM -0400, Ted Unangst wrote:
> Let's say you have a football field in need of a trimming, but the lawn 
> mowers are all broken, but you have an oxen store nearby.  Oh, and the big 
> match is in an hour.  How many oxen do you need?
> 
> Normally, you'd use units, but...
> You have: m2/hr
> You want: ox
> unknown unit 'ox'
> 
> Easy fix.  Working from historical defintion of an acre as the area an ox 
> can work in a day, we get:
> 
> You have: m2/hr
> You want: ox
>         * 0.0059305292
>         / 168.61902
> 
> Tada!  Now you know that 6400 m^2 field you have is going to require 38 
> oxen.
> 
> Index: units.lib
> ===================================================================
> RCS file: /home/tedu/cvs/src/usr.bin/units/units.lib,v
> retrieving revision 1.11
> diff -u -r1.11 units.lib
> --- units.lib 17 Jul 2002 16:42:12 -0000      1.11
> +++ units.lib 13 Oct 2010 23:49:55 -0000
> @@ -180,6 +180,8 @@
>  
>  acre                 4840 yd2
>  
> +ox                   acre/day
> +
>  cc                   cm3
>  liter                        kilocc
>  ml                   milliliter

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