On 10/22/2016 12:04 PM, Bod wrote:
On 22/10/2016 18:29, wrote:
On Sat, 22 Oct 2016 16:45:34 +0100, Bod wrote:

Anu ideas why the USA hasn't changed to the Centigrade system?
Only a handful of countries use fahrenheit today.

Centigrade makes a much more logical system.
Centigrade: 0C is freezing and 100C is boiling.

If the only thing you are interested in is the state of distilled
water at sea level, I agree C is better. I use it in scientific
measurements regularly too but there are 50 million Americans who do
not want to be confused by two systems and it would take a while to
get them all switched over.
To start with we would need to buy about a billion new thermometers,
then learn what 30c means when we see that is what the pool is at.
There is also that issue of how precise F is compared to C without
resorting to fractions of a degree, mentioned above.

The UK didn't have any problems changing over. Anyway, most electronic
thermometers give you the choice to set C or F.
OK, but...
There are many more thermometers in current use that are not
electronic.
My house is only 44 years old and the thermostat is F.
It's about the installed base. You're free to use whatever scale you wish.
In the USA, using F provides the best communication with other
people in everyday life.
If you told me it was 30 degrees outside, I'd assume you meant F.
If you told me it was 30 degrees C outside, my reaction would be,
"HUH?". It's not that we can't do the math, but why should we.
If my oven is F and the cookbook is in F, there's no upside and some
downside in trying to
use C anywhere else.