Hi Alexander -- on Feb 19 2020 at 14:00, you wrote:

AK> Another my theory is that in Russia we use so called "alcohol

Another of my theories

AK> meter". It looks like a usual glass thermometer, but in reality it
AK> floats vertically, like a fishing float and has a scale on its side.
AK> If you put it into a glass of alcohol it will show you its purity.
AK> ;) That scale maybe is in degrees, although I am not sure.

We have those for wine making, called a wine hydrometer - it measures
specific gravity, potential alcohol, and has a Brix scale, among other
options.

https://eckraus.com/hydrometer-scales-and-what-they-mean/


Cheers... Dallas

--- timEd/NT 1.30+