And you are right Dick, although many in the professions 'can't be told'. The usual mercury column thermometers that get stuck under the armpit or into the mouth (we won't discuss other orifices) could still be 'estimated to half a division' so honour was salved irrepective of the scale used. These days it's all digital (binary, that is; keep your fingers and toes out of this) and most instruments are made for most markets, so their displays have instant conversions. One electronic 'balance' (weighing machine, really) I use is routinely used to measure grams to 3 decimal places but will, if you ask it nicely, display in ounces, grains (for the gun nuts) and a few other things I never knew about.

Cheers, Rowan