"Graculus" wrote in message
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"Redman" wrote in message
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The stuff I've got has a measuring cap and it says 20ml to a gallon of
water

20ml per gallon? That's a rather strange mix of units.


In general, imperial measures, gallons, pints feet yards seem better
suited to measuring out and conceptualising larger quantities, yards
feet, gallons, pints etc, whereas metric is more useful when it comes
to precision measurements. When making a bookshelves for instance its
much easier* to plan it in feet when buying the wood, but much easier
to do the fine measurements prior to cutting in mm. Which are far easier
to work with - add, subtract, etc than are 16ths of an inch.
In gardening, in many places gallon measures are still far more common
than litres, whereas most dispenser caps are marked off in mm. Maybe
for that very reason.

michael adams


*At least for people who have been doing so successfuly for years and
have the well worn neural pathways in the brain, to convince themselves
of the fact. And then, when feet and yards no longer suffice, it's
onto double decker buses and football pitches.







..