The Ohio law specifies a cord of firewood be a volume of 4' wide x 
4'high x 8' long. In some areas city water is charged by th cubic foot, 
and in others by the gallon.

Spehro Pefhany wrote:
> At 09:35 PM 2/9/2008, you wrote:
>>>> ... and for
>>>> distances where you need fuel calculations can often be
>>>> approximated as a
>>>> small integer, and then the fuel consumption calculation
>>>> becomes easy.
>>> Hogsheads per Hectometre ?
>>
>> We used to use 'per acre' some while ago, but better metric
>> equivalents now commend themselves.
>>
>> Alas, our recently bought Mitsubishi Chariot turbo achieves
>> a fuel economy of about 0.14 square mm * even when driven
>> gently.
>>
>>
>>         Russell
>>
>>
>> Useful note:    10 litre/100km is 0.1 mm^2.
> 
> Fuel consumption, not "economy", no?  Maybe the reciprocal for
> economy.. ~7 mm^-2
> 
>> Best regards,
> 
> Spehro Pefhany --"it's the network..."            "The Journey is the reward"
> speff@interlog.com             Info for manufacturers: http://www.trexon.com
> Embedded software/hardware/analog  Info for designers:  http://www.speff.com
> 
> 
> 
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