On Nov 28, 12:00 pm, "frederick ploegman"
wrote:
"jim" wrote in message

...

Hi Gene, alcohol is definitely less dense than water, but if a wine at
1.000 is not quite dry, why do they calibrate 1.000 with 0PA? Do you
see why I think it is confusing?

Jim

The scales on a hydrometer are like a snapshot. A picture of a
moment frozen in time. That picture is of a prepitch must with
no alcohol in it. Once alcohol enters the picture, the claibration
on the hydrometer is no longer valid. HTH

Frederick

Now that makes it all coherent for me, thanks Frederick!